At 34mm, the Air-King is small by today’s standards. Its heritage is the classic Rolex Oyster Perpetual, and it’s evolved very little over the years. The Air-King is typically seen with a smooth bezel and an oyster bracelet.

Cellini is an entire collection of dress watches for both men and women. This line is so different from the Rolex branded watches that we all know, that it’s virtually a sister brand to Rolex, much like Tudor is. However, they are signed ‘Rolex’ and ‘Cellini,’ and bear the crown logo.

The Rolex Date is another watch similar to the Air-King, and measures the same 34mm diameter. As its name implies, it had a date function and was available in steel, two-tone steel and yellow gold, or yellow gold. Recent references have been made in steel only.

The 36mm Datejust was introduced in 1945. From Day 1 it’s been one of the most popular – and most iconic – Rolex watches. A solid gold version of the Datejust, the 150,000th certified chronometer that Rolex produced, was given to future President Dwight Eisenhower on Dec. 19, 1950. It can be seen in his portrait which appeared on the cover of Life Magazine’ July 21, 1952 issue.

Like the Day-Date II, the Datejust II is a larger, 41mm version of the Datejust. It was introduced in 2009 to align the iconic model with the general trend in larger watches.

The Datejust Midsize is the 31mm version of the Datejust. Currently (in 2014) it’s also known as the Datejust Lady 31. It features Roman numerals or jewels for hour markers on the dial, and is available in a variety of metals, bezels, and dials.

The Datejust Oysterquartz was available from roughly 1977 to 2001. It was part of Rolex’s response to the quartz revolution (the balance of their response to quartz was to ignore it and keep making mechanical chronometers). The watch was available in several combinations of steel and gold, with and without gems set in the dial. Style wise, the watch had...

This version of the Datejust is also called the Thunderbird. The Turn-O-Graph features a rotating bezel with minute indication, and was originally favored by pilots in the 1950s

The Day-Date features the date window under a cyclops at 3 o’clock, and the day is displayed in an arcing window at 12 o’clock. This watch is often called the President, a name often erroneously attributed to President Eisenhower (Eisenhower’s Rolex was actually a Datejust)...

The Day-Date II is an updated Day-Date which was released in 2008. At a more modern 41mm, it’s larger than the Day-Date. It features the same familiar day and date windows. It is available only in platinum or gold. The Day-Date II also comes mounted on the President bracelet.

The Day-Date Masterpiece is a 39mm version of the Day-Date. Available in gold or platinum, the
Masterpiece features a diamond bezel and unique dials of mother of pearl, meteorite, or unique colors. The bracelets used are unique to the Masterpiece collection, and can be one, two, or three-color combinations of gold and platinum.

The Day-Date Masterpiece is a 39mm version of the Day-Date. Available in gold or platinum, the
Masterpiece features a diamond bezel and unique dials of mother of pearl, meteorite, or unique colors. The bracelets used are unique to the Masterpiece collection, and can be one, two, or three-color combinations of gold and platinum.

The Explorer is a no-date watch and features the Arabic numerals 3, 6, and 9 at their respective
positions on the dial. This watch is so-named partly because Sir Edmund Hillary wore one on the first successful ascent of Mt. Everest.

The Explorer II has gone through several changes since being introduced in 1971. These include
cosmetic changes (e.g. the shape of the 24-hour hand) and functional changes (how the 24 hour
display operates). In 2011 the size was increased from 40mm to 42mm. Modern Explorer II watches display two time zones, but unlike the GMT Master, the bezel does not rotate.

The GMT-Master was originally a joint project between Rolex and Pan American World Airways. Pan-Am wanted a watch to help their pilots keep track of time at home while traveling around the world and approached Rolex to design a dual time zone watch. The GMT-Masters look a lot like a Submariner, but have a depth rating of only 30 meters...