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The Four References of the Rolex Explorer II

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Different Rolex Explorer II Versions and Evolution

Possibly one of the most niche models from Rolex yet, the Explorer II was created with the spelunker in mind—a person who explores caves as a sport. As you can imagine, spelunkers have some very particular gear requirements due to the nature of caving. For example, they are often in the dark and in wet environments. So, in the 1970s, Rolex looked to service this particular group of adventurers with the Explorer II watch. Let’s investigate the different Rolex Explorer II versions and the collection’s evolution.

The Inaugural Explorer II Ref. 1655

Unveiled in 1971, the first Explorer II model was the ref. 1655 with a 40mm stainless steel case, 24-marked fixed bezel, black dial, and an orange arrow-tipped extra 24-hand. The premise behind the 24-hour hand was it would allow cavers to tell the difference between night and day even while they were in complete darkness for extended periods of time.

To withstand arduous surroundings, the Explorer II ref. 1655 is crafted in stainless steel and is water resistant to 100 meters, thanks to the watertight Oyster case. Also, just like the GMT Master of the era, driving the 24-hand, time, and date function of the ref. 1665 is the Caliber 1570/1575.

It’s interesting to note that while the ref. 1655 did not do well during its era, it’s now a highly sought after vintage Rolex sports watch and it’s often referred to by its nicknames. There’s the (erroneous) “Steve McQueen” moniker, as well as the Italian “Freccione” label.  Learn more about these popular nicknames for the stainless steel Explorer II.

The Transitional Explorer II Ref. 16550

In 1985, the Explorer II ref. 16550 brought a slew of modifications to the model. In fact, the face of the watch completely changed. Gone were the 24 lume plots in favor for 11 luminescent indexes. Plus, the Explorer II ref. 16550 included Mercedes-style hands, sapphire crystal, Caliber 3085, and a longer and thinner red 24-hour hand. Even the numerals on the bezel changed.

For more choice, Rolex offered both a black dial and white dial version of the Explorer II ref. 16550. Rolex enthusiasts sometimes call white dial versions of the Explorer II the “Polar.” The Explorer II ref. 16550 was only in production until 1989, thus considered a “transitional” model.

Mens Rolex Stainless Steel Explorer II White 16570

The Long-Running Explorer II Ref. 16570

Although these newer Rolex Explorer II versions had a similar look to the previous ref. 16550, the white dial versions of the Explorer II ref. 16570 included black surrounds on the indexes.

In production for over two decades, early models of the Explorer II ref. 16570 ran on Caliber 3185. On the other hand, not only did later models have the then-new Caliber 3186, they also featured the new “ROLEX ROLEX ROLEX” engraved rehaut for counterfeit prevention.

Mens Rolex Stainless Steel Explorer II 42mm Black 216570

The Current Explorer II Ref. 216570

On the occasion of the Explorer II’s 40th anniversary, Rolex presented the ref. 216570 in 2011. And in true Rolex fashion, the watch paid tribute to the original Explorer II while also presenting completely new features.

The Caliber 3187 powers the Explorer II ref. 216570, and measures larger at 42mm. However, as a nod to the inaugural model, both the white and black dial versions of the Explorer II ref. 216570 boast an orange arrow-tipped 24-hand.

With great style and a rich legacy, the Rolex Explorer II mens timepieces may have had a slow start, but they currently enjoy solid popularity. Even if the only spelunking-like activity you engage in is enjoying the darkness of your man cave, the Explorer II is a great Rolex sports watch to own.

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