The Rolex History & Timeline
As with many successful companies, Rolex is very secretive of the interworking of the company, its direction, and its history. Patrick Heiniger, Rolex CEO in 2008, shared that he was most grateful for holding a company that is not accountable to financial analysts and in a position acquire the most beautiful building in London after Buckingham Palace, without the help [and interference] of a bank. The following is an attempt to compile what has been written about Rolex’s history over these last few years of a company that keeps its story, history, and future to itself.
The story of Rolex the company and Hans Wilsdorf, its founder, are inextricably intertwined. Rolex, like the modern day Apple Computer, revolves around the passion of one man who drove the company to greatness. Even after the passing of Hans Wilsdorf at Rolex and Steve Jobs at Apple, both of these companies continue to be strong in their respective industries because of the drive, passion, marketing prowess, and a relentless pursuit of detail and perfection. Like Apple computer, Rolex’s history goes back to its initial founder, Hans Wilsdorf. Most of the depictions of Rolex history goes back to the founder because the company’s roots, design and marketing ethos and purpose are rooted in the founder’s life experiences and the story of Rolex is no different.
The start of Rolex goes back to the birth of Hans Eberhard Wilhelm Wilsdorf who was born in Kulmbach, Bavaria, Germany on March 22, 1881. The son a hardware store owner (ironmonger), Wilsdorf was destined to continue the family business, but both his parents died within months of each other when Wilsdorf was 12. Wilsdorf’s mother was a descendent of the Maisel brewing dynasty, so there were expectations that Wilsdorf would continue one of the family businesses, but that was not to be. Wilsdorf and his siblings were left in the care of his aunt and uncle, who went to sell the family hardware business and placed the proceeds into the Wilsdorf Trust until the heirs reached of age. The Wilsdorf Trust, started as a result of tragedy, was the basis for Hans Wilsdorf Foundation started later in Wilsdorf’s life.
From his parents passing, until the age of 18, Wilsdorf went to boarding school in Coburg, excelling in math and languages, particularly English. At age 18, soon after boarding school, Wilsdorf developed an inkling for Geneva, Switzerland through a boarding school friend. Wilsdorf worked at a pearl distribution company learning much of world trade and the jewelry industry. After a stint in the pearl industry, Wilsdorf left and jointed watch exporters Cuno, Korten. Having no watch experience, Wilsdorf worked as a correspondent/translator, being asked to write letters namely in English. It was at Cuno Korten that Wilsdorf wanted to pursue watches and the watch industry. Cuno Korten purchased most of its components from manufacturers in France, Germany and Switzerland. Wilsdorf commissioned three watchmakers to fabricate three pocket watches that were soon certified chronometers at the Neuchatel Observatory. Those watches sold quickly for a profit, which impressed Wilsdorf’s bosses.
After a short compulsory Army stint, at the age of 22, Wilsdorf decided to move to London in 1903 to work in the English watch industry at an unknown watch company while planning to start his own watch company. On his trip to London, thieves had stolen Wilsdorf’s inheritance totaling 33,000 German gold marks. At age 24, Wilsdorf met Alfred James Davis and partnered with him to build their own watch making company. Davis had the money to invest and Wilsdorf had the watchmaking knowledge from his experiences at Cuno Korten. The partnership was further strengthened by Davis who married Wilsdor’s younger sister. Wilsdorf also acquired British citizenship after a battle with the city of Geneva about the confiscation of a plot of land on Lac Leman.
Wilsdorf utilizing money borrowed from his siblings matching Davis’ investment, they each owned 50% of the company. As equal partners, they complimented each other skills and backgrounds. Wilsdorf knew watches and Davis knew financing and international trade. The start of Wilsdorf & Davis Ltd, utilizing ebauches from Jean Aegler based in Bienne. Wilsdorf learned of the Aegler while working at Cuno Korten. Keeping focused, Wilsdorf and Davis only produced two watches; pocket watch and a purse watch respectively for men and women. In addition to these watches, Wilsdorf learned of the utility of wrist watches in the Boer War and decided to specialize in what was then a non-existent market. At the time, wristwatches were small in size, in number, not known to be very accurate, and worn primarily by women. Gentlemen were quoted to say that they “would sooner wear a skirt as wear a wrist watch.” Additionally, the watch industry at the time thought that a wrist watch could not withstand the rigors of human activity. This all changed with the Boer War as the heat prevented soldiers to wear jackets and soldiers found themselves strapping small pocket watches on their wrists.
Wristwatches appeared to be more than just a passing fad and became very popular. In 1912, Wilsdorf returned to Bienne and negotiated with Aegler for a consistent supply of watch movements and was the largest contract ever signed for watch movements at the time. Also, at the same time, trademark and logo styles were an industry trend. The name Wilsdorf & Davis did not have the same sound at Kodak and Coke. Wilsdorf & Davis thought of a company name that does not mean anything in particular, is easy to pronounce in multiple languages, is hard to misspell, and thus settled on the name Rolex. Just as how the name Apple does not have anything direct connection to computers, Rolex had no direct link to watchmaking.
Dispelling the myth that wrist watches are not accurate, Rolex sent its first movement to the School of Horology in Bienne in 1910, one of the early time keeping institutes. Rolex was awarded the world’s first wrist watch chronometer rating. With the rating, Rolex overcame the first challenge of wristwatches to keep accurate time. The other two challenges were keeping wrist watches water tight, and to be autowinding. Further proving the accuracy of well built wrist watch movements, Rolex was awarded the “Class A Certificate of Precision” from the Kew Observatory in England, the first certificate awarded to a wrist watch. The testing involves 45 days in five positions and three temperatures. Prior to Rolex, these certificates were only awarded to marine chronometers. Realizing the value of timing certificates, Wilsdorf insisted that all Rolex timepieces would undergo similar testing and no Rolex should be sold without its “Official Timing Certificate.” For Aegler, Rolex would not accept any movements unless they passed Rolex’s seven day battery of tests. Accepting no less than a timing certificate, Rolex set the timing standard for the rest of the watch industry.
With a consistent supply of watch movements from Aegler, and a registered brand name (in Switzerland in 1908 and England in 1912) that anyone can pronounce, and a product that was in high demand but none of the traditional watchmakers wanted to make, the company was on sure footing. The start of World War I further helped wristwatch demand, but brought anti-German trade restrictions to England. Because of the high tariffs on watch and jewelry components coming into England, Wilsdorf and Davis decided to move much of the production back to Bienne utilizing the partnership they forged with Hermann Aegler. In 1919, Rolex purchased a percentage of the Aegler company and began to call itself Aegler S.A. Rolex Watch Company. Soon after that, Wilsdorf bought out Davis’s share of the company and moved the office to Geneva where he registered “Montres Rolex S.A.” on January 17th. Wilsdorf settled in Geneva in order to let the factory in Biel be entirely devoted to manufacturing watch movements where Geneva would focus upon creating case models that fit cosmopolitan tastes. The movements were manufactured in Biel/Bienne, but the watches are assembled in Geneva.
On May 2, 1925, Rolex trademarked the famous crown or coronet in Geneva, Switzerland. After an expensive advertising campaign in 1926 to raise brand awareness that “Rolex” began to appear on every dial exclusively. The Rolex name quickly became synonymous with quality and distinction.
Also in 1925, Rolex addressed the weak spot in all watch cases, the winding stem and its predilection for leaking water and dust. Wilsdorf heard of a patent filed by Paul Perregaux and Georges Peret for a new winding stem and button/crown. Wilsdorf bought the patent and registered the world’s first waterproof case, the Oyster, on July 29, 1926 in Switzerland, and again in London on February 28, 1927. The term Oyster came to Wilsdorf while trying to open an oyster at a dinner party. Opening Rolexes today requires special tools very similar to opening an Oyster at a restaurant. The sealed crown, combined with a water tight synthetic crystal also introduced at the time, along with a threaded bezel and caseback introduced by Aaron Dennison, founder of Waltham Watch Company, Wilsdorf now had the three main watch deficiencies addressed, the crown, the case, and timing accuracy all addressed.
Despite patent protection, Wilsdorf had to defend its patent from imitators. In 1934, Wilsdorf filed against Schmitz Brothers in Grenchen, Germany. After a 2 ½ years of litigation, the Swiss court agreed on July 8, 1937 that Schmitz Brothers owed compensatory damages to Rolex. Although Wilsdorf had not invented the water proof watch, he was the first to make the idea practical and fabricate using modern industrial manufacturing methods.
With a human-proof watch, Wilsdorf showed his marketing prowess by launching yet another massive advertising campaign to promote the Oyster waterproof watch. Unlike other watches at that time, the Oyster was designed to withstand the day-to-day elements. On October, 21, 1927 Wilsdorf launched an advertising campaign showing Mercedes Gleitze, a 26 year old London typist who became the first women to swim the English Channel. In her vindication swim, two weeks after her first successful attempt Gleitze was the first to do such a feat while wearing a watch, and a Rolex nonetheless. After her first successful swim, Wilsdorf saw an opportunity to promote the toughness of his watches by having her wear one on a chain around her neck during Gleitze’s second swimming attempt. Wilsdorf realized that advertising alone would not associate quality and reliability in the consumers mind, it had to be proven. The Mercedes Gleitze swim was one of the first instances of using athletes and explorers as first person testimonials for watch durability and reliability. The ad in England’s Daily Mail newspaper on 24 November 1927 boasted of the “greatest triumph in watchmaking” along with Gleitze’s testimonial quote stating her Rolex Oyster “proved itself a reliable and accurate timekeeping companion even though it was subjected to complete immersion for hours in sea water at a temperature of not more than 58 and often as low as 51 [10-14 degrees Celsius.]”
Wilsdorf realized that although the case was sealed, being human was not. Watch wearers would forget to wind their watch, or would leave the crown unscrewed leaving the movement open to dust and water. Wilsdorf’s next technical challenge was coming up with a method for automatic winding. Earlier in the decade, John Harwood introduced the first self winding wrist watch based on a weight swinging from a central point on top of the case, similar to a playground swing, and the mainspring wound by the weight contacting a wheel that would tighten the mainspring. The design was based on a pedometer design from 1770 by Abraham Louis Perrelet. The weight was restricted through the use of bumpers. The technical drawback was that the bumpers proved destructive and was not an efficient use of centrifugal force. Nonetheless, the design showed the utility of having a fully sealed watch that did not require unscrewing the crown to insure its daily function.
Wilsdorf was set on using his existing movement with a modification for auto winding. In 1931, Wilsdorf used an existing Aegler movement and a winding mass placed upon center axis that could turn uninterrupted in both directions and thus a “perpetual” motion. Demonstrating how ingenuity stays in the family, Herman Aegler’s brother-in-law and the technical lead at Rolex is credited with the center-staff rotating weight design that is now commonplace in all automatic watch movements world-wide after the patent expired in 1948. In addition to having a water-tight case, the mainspring is now consistently wound providing a full tank of power that improves watch timing. A full and consistent power reserve allows for consistent timing, which underlies Rolex’s records for accuracy throughout the 30’s, 40’s and 50’s. By 1934, Rolex was the first watch company to receive class certificates from all four of the main observatories (Kew, Geneva, Neuchatel, and Besancon).
1931 brought disaster and opportunity. Rolex business flourished, but the British pound was drastically devalued on September 21 as a result of the world economic crisis and the Great Depression. The devaluation caused Rolex prices to rise, decreasing exports by 60%. If Rolex were to survive, it would have to sell outside of the British Empire. Subsequently, Wilsdorf established subsidiaries in Paris, Buenos Aires, and Milan as well as exploring business activities in the Far East. The expansion was successful as the production of Rolex Oysters increased from 2,500 to approximately 30,000 watches a year.
In 1944, Wilsdorf’s wife May died in addition to his long-time business partner and friend Hermann Aegler, leaving Wilsdorf as Rolex’s sole owner. With no heirs, and living the aftermath of his father’s death, Wilsdorf created the Hans Wilsdorf foundation in 1945. The trust was underwritten to provide strict direction on how the company was to be run after Wilsdorf’s death, ensuring that the company would never merge with another company, be sold, or publicly traded. Rolex still runs under the direction of the Hans Wilsdorf Foundation. Wilsdorf specified precise direction on the distribution of dividends. The majority of the money was donated to charity in honor of his late wife. Additionally, dividends were to fund a watchmaking school, a fine arts academy, and business and social science faculty at universities. Wilsdorf Foundation proceeds also fund the Swiss watch research lab in Neuchatel as well as it helped build a language library for the blind and an exhibition pavilion in Lucerne for animal protection. The Rolex Awards today are currently underwritten by the Hans Wilsdorf Foundation.
In 1945, Rolex continued to innovate by introducing the date window to mark the firms 40th birthday.The DateJust caliber 740 was the world’s first automatic date mechanism in a wristwatch. Called the DateJust because, well, Date is obvious, but “Just” stands for “just in time,” advancing precisely at midnight without delay. The date window was located on the right edge at 3:00 o’clock because most wearers have their watch on their left arm and the date window can easily peak out from under a shirt sleeve. The DateJust also possessed a central second hand, moving from the subsidiary second hand that was the style at the time. Also, in 1948 the 15 years of the original patent protection on the automatic winding rotor came to an end. Only after 1948, other brands were able to manufacturer automatic watches.
The 1950’s were a decade of post war growth and achievement for Rolex. On May 29, 1953, experimental Rolex Explorers rose to 29,035 ft above sea level on the wrist of Sir Edmund Hillary and Tenzing Norgay while in the same year, a specially designed Deep Sea Special was attached to the exterior of Auguste Piccard’s bathyscaphe which reached a depth of 10,335 ft, proving the concept that watches can be as pressure proof as submarines. Also in 1953, Rolex introduced at the Basel watch show the Turn-O-Graph, the predecessor of the Submariner. Following in 1954, Rolex released the Submariner with water resistance to 100 meters as well as the Milgauss and the GMT Master pilots watch, and finally, the Oyster Perpetual Day-Date, the only watch that showed both the day and the date simultaneously. Closing out the decade in 1959 was the introduction of the Submariner 5512, water resistant to 200 meters along with the introduction of crown guards that are prevalent on all Rolex sport watches. Also during the early 1950’s, Rolex incorporated the venerable Cyclops window to the date aperture after Wilsdorf’s near-sighted second wife could not read the date on her watch. Also during the 1950’s Rolex had planted subsidiaries in Bombay, Brussels, Buenos Aires, Dublin, Havana, Johannesburg, London, Milan, Mexico City, New York, Paris, Sao Paulo and Toronto.
It is also important to note that that Rolex’s Public Relations Director, was pivotal in Rolex direction for making true tool watches. Rene-Paul Jeanneret was one of the most important executives at Rolex during the 1950’s and into the 1960’s. Jeanneret was the driving force behind the concept of watch being designed for individual sports or professions. The notion of a watch for divers, for explorers, and for businessmen came from Jeanneret. When Pan-Am approached Rolex for a watch that could track 24 hour GMT time, the timing standard for airline pilots and navigators, it was Jeanneret who pursued the concept of the 24 hour hand on a watch, and a rotating bezel that would allow timing in another timezone.
Taking an existing Turn-O-Graph, and fitting it with a 24 hour hand and using the same bezel technology but with a bright plastic insert, Rolex introduced the GMT at Basel in 1954. Because it was a derivative of the Turn-O-Graph, it did not have crown guards and was significantly smaller than the Submariner also introduced the same year. The GMT was the first sport watch to possess a Cyclops, taken from the Turn-O-Graph model.
1960 was both a high and a low for Rolex. Rolex continued its technological evolutions by introducing the first Cosmograph chronograph model with featured a tachymetric timing ring on a metal bezel. Also, in 1960, Rolex bested it already world record for submersion by attaching a Deep Sea Special to the to the Trieste bathyscaphe exterior while it descended to the bottom of the Mariana Trench at 35,798 feet, a depth greater that Mount Everest is tall.
Shortly after the success of the Deep Sea Special, 1960 also saw the passing of Rolex’s founder Hans Wilsdorf on July 6th leaving Rolex to appointees stated in the Hans Wilsdorf Foundation. Starting in 1963, Andre J. Heiniger lead Rolex throughout the second half of the century until 1992 when his son Patrick took the reins. The 1960’s saw more evolutions of the existing DateJusts, Air Kings, and the sports/tool watch line. In 1967, Rolex introduced the Sea-Dweller, the first watch created with a helium gas escape valve for saturation divers. Standard Submariner watch crystals were popping off during helium decompression for saturation divers. In coordination with Comex, a French saturation diving company, Rolex designed a Sea-Dweller model that was heavier than the standard diving Submariner, and possessed a helium valve that would release small helium molecules that would enter the watch during saturation compression, yet be pressure proof when underwater. Also in 1967, Rolex introduced the Submariner 1680 complete with a date window through the dial like on the Turn-O-Graph and DateJust models.
From the 70’s to present day, Rolex continues in the words of Patrick Heiniger, that “Rolex is evolutionary not revolutionary.” Even with competition from legitimate and illegitimate imitators, Rolex continues to produce new watches, new technologies such as the Paracrom hairspring, Paraflex shock absorbers, and the use of ceramics. Although still very secretive, it is estimated that Rolex produces approximately 2000 watches a day and has been consistently ranked in the top 100 global companies.
|Historical Timeline and Listing of Technical Achievement|
|1905||Founding of “Wilsdorf & Davis.” A distribution company of watchcases and other horological items headquartered in London.|
|1908||Hans Wilsdorf registers the Rolex trademark located at La Chaux-de Fonds, later moving to Bienne.|
|1910||Rolex obtains the first Official Swiss Chronometer certificate|
|1914||Rolex obtains a Class “A” certificate, Kew Observatory in English as the first wristwatch to outperform a pocket watch.|
|1919||Hans Wilsdorf moves the company office to 18 Rue du Marche, Geneva and establishes the manufacturing company, Montres Rolex S.A.|
|1926||Rolex patents the screw-down crown, and creates the oyster case with a screw down caseback and bezel.|
|1927||Mercedes Gleitze swims across the English Channel wearing a Rolex Oyster. The swim lasted 15 ¼ hours.|
|1928||Rolex obtains a First Class Certificate from the Geneva Astronomical Observatory, the first ever awarded for a 6 ¾” wrist watch.|
|1931||Rolex invents and patents the “Perpetual Automatic Rotary Winding Mechanism.”|
|1935||Sir Malcom Campbell breaks the world automobile speed record (300 MPH) wearing a Rolex wristwatch.|
|1939||Rolex introduces the fist chronograph with 30-minute and 12 hours totalizers.|
|1945||Rolex introduces the DateJust, the first automatic and water wristwatch chronometer.|
|1947||Rolex introduces the waterproof chronograph with 12-hour totalizer and triple date.|
|1947||Chuck Yeager breaks the “Sound Barrier” in a Bell X-1 wearing a Rolex Oyster, the same one he had worn throughout his deployment in WWII.|
|1950||Rolex introduces the Turn-O-Graph, the first Rolex with a rotating bezel and the precursor to the Submariner.|
|1953||Rolex introduces the Submariner, the first automatic diver’s wristwatch water-resistant to 100 meters.|
|1953||On May 29, Rolex rose to 29,035 ft above sea level on the wrist of Sir Edmund Hillary and Tenzing Norgay.|
|1954||Rolex introduces the Submariner Ref. 6200, water-resistant to 200 meters.|
|1954||Rolex introduces the GMT-Master, an automatic chronometer with a 24 hour hand for aircraft pilots.|
|1956||Rolex introduces the Day-Date model, first wristwatch to spell the day of the week as well as the numeric date.|
|1957||Rolex patents a new Microstella regulated balance in Beryllium.|
|1959||Rolex introduces the Submariner Ref 5512 water resistant to 200 meters.|
|1960||Rolex straps a specially designed Deep Sea to the bathyscaphe Trieste which descended 10,916 meters to the bottom of the Mariana Trench being the first watch to reach such a depth.|
|1960||Hans Wilsdorf passes away on July 6, leaving Rolex to appointees stated in the Hans Wilsdorf Foundation.|
|1963||Rolex launches the first Oyster Cosmograph series ref. 6239.|
|1963||Andre J. Heiniger leads Rolex to 1992, when his son Patrick takes over.|
|1964||Rolex patents a pressure-proof screw-down push button for chronographs.|
|1967||Rolex, in conjunction with Comex , a French diving company, releases the Sea Dweller guaranteed water-resistant to a depth of 610 meters.|
|1967||Pete Knight breaks Mach 6.72 (4,534 MPH) in an X-15 aircraft wearing a GMT-Master; a record that still stands today.|
|1969||Rolex releases a Submariner with date and water resistant to 200 meters.|
|1970||Rolex starts using synthetic sapphire crystals with the introduction of the all gold OysterQuartz beta ref 5100. Rolex started rolling out sapphire crystals throughout the 70’s and 80’s. By 1989, all Rolex watches were fitted with sapphire crystals.|
|1971||Rolex releases Reference 1655, the first Explorer II with the solid steel 24 hour bezel famous orange 24 hour hand.|
|1978||Conquest of Mt. Everest without oxygen by Reinhold Messner, who wore an OysterQuartz|
|1982||Rolex redesigns the GMT Master II and allows timing in three different time zones rather than two by allowing an independently set 12-hour hand.|
|1984||Rolex updates the Explorer II to reference number 16550 to resemble other successful selling models, the Submariner and GMT II. The 16550 was available in either white or black dial and shared the same independent 12 hour hand as the GMT Master II.|
|1985||Rolex surpasses more than 4 million movements officially awarded the “Chronometer” title.|
|1986||Guided by only a sextant and their Rolex chronometers, Will Steger and Paul Schurke lead the first expedition without resupply to reach the North Pole.|
|1987||Rolex starts using 904L stainless steel in its Sub Date 168000 that uses a high Nickel and Molybdenum content to help prevent pitting between the caseback and the case that results in salt water seeping into the threads. Rolex previously used 316L Steel. Rolex used a mixture of 316L in its bracelets and cases until the mid-2000’s when the DeepSea was made exclusively with 904L steel. Modern Rolex stainless models introduced later than 2011 use 904L in the bracelet, case, clasp, and caseback.|
|1988||Rolex redesigns and releases the new Oyster Perpetual Cosmograph Chronometer “Daytona.”.|
|1988||Rolex purchases its watchband supplier – Gay Frères.|
|1992||Patrick Heiniger takes the reins from his father leading Rolex until December 17, 2008. Heiniger, a lawyer by training specialized in intellectual property and international law.|
|1996||Rolex manufactures more official Swiss Chronometers than all other manufacturers combined.|
|2000||Roles launches the new Oyster Perpetual Chronometer Cosmograph “Daytona” with Rolex’s in-house movement.|
|2005||Launch of the new GMT-Master II, with a new 3186 movement, Paracrom hairspring, and ceramic bezel.|
|2007||Rolex re-releases the Milgauss, a newly redesigned watch from a old classic that is resistant to magnetic fields up to 1000 gauss; Rolex releases the Yacht-Master II, the first yachting watch with a programmable countdown feature and memory utilizing side pushers and the bezel.|
|2008||Rolex introduces the new Deep Sea SeaDweller water resistant to 3,900 meters.|
|2008||Patrick Heiniger suddenly resigns from his position, two days after Rolex today denying a L’Agefi report that the company lost 1 billion Swiss francs ($900 million) invested with Bernard Madoff, who was later convicted of the largest financial fraud in U.S. history. Bruno Meier, Rolex’s CFO takes over as CEO.|
|2008||Rolex employs over 4000 people and is estimated to be worth over 5 billion dollars.|
|2011||Rolex names a new CEO, Gian Riccardo Marini, formerly Rolex Italy SpA’s chief.|
|2012||On March 26, Rolex revisits the Mariana Trench with an experimental DeepSea Challenge watch strapped to the outside of James Cameron’s vessel. The watch survived the 2.5 hour decent, 60 minutes on the trench floor, and the 70 minute ascent back to the surface.|
- Rolex has a range of 170 models available in 3,200 combinations.
- Rolex has three company restaurants serving 900 meals a day
- Rolex is the biggest user of gold in Switzerland and the only watch company that does its own alloying. When its technicians discovered a microscopic trace of titanium in a shipment of steel, Rolex returned the entire 10 tons of it back to the supplier.
- If a GMT hand is set to local time, it will always point north (in the Northern Hemisphere), when the 12-hour hand is pointed to the sun. The same is true in the Southern Hemisphere, but the watch had to be read while it is overhead.
Resources used for the article:
A Rolex Review: WatchTime Magazine Limited Edition. 2007. Watch Time Magazine. March 2007. New York NY
The Best of Time Rolex Wristwatches. 2006. James Dowling and Jeffrey P. Hess. Write Time Partners II.
James Cameron Makes First Ever Successful Solo Dive to the Mariana Trench. 2012. National Geographic Press Release. March 26, 2012.
Revolution: The Evolution of the Rolex Sports Watch. 2008. Antiquorum Auctioneers. New York NY
Rolex Report: An Unauthorized Reference for the Rolex Enthusiast. 2002. John Brozek. Infoquest Publishing. St. Petersburg Florida
Rolex: Special edition by Stiletto Magazine. 2008. December. Stiletto Editions, Paris France
Rolex Chief Patrick Heiniger Resigns After 16 Years. 2008. Bloomberg Press. December 17. New York NY