The Rolex Explorer II, a tool watch designed for exploration and adventure, enjoys a dedicated following among watch enthusiasts. Its robust build, legendary reliability, and distinctive features, including its iconic 24-hour bezel, make it a highly sought-after timepiece. This article will focus on a specific, often overlooked, subset of the Explorer II family: the 16570 models produced during the transition from Tritium to Luminova lume. These watches, manufactured around 1998, represent a fascinating middle ground in the Explorer II's history, embodying a unique blend of old and new technologies. Understanding their nuances requires a closer look at the bezel, the dial, and the overall evolution of the reference.
Rolex Explorer II: A Brief History
Before delving into the specifics of the 16570 and its bezel, a brief overview of the Explorer II's history is warranted. First introduced in 1971, the Explorer II (reference 1655) was designed to meet the demands of explorers venturing into caves and other environments with limited daylight. Its defining feature, the fixed 24-hour bezel, allowed wearers to distinguish between day and night, even in complete darkness. Subsequent iterations, including the reference 16550 (with a sapphire crystal) and the 16570 (the focus of this article), refined the design while retaining its core functionality.
The 16570, produced from 1989 to 2011, marked a significant period in the Explorer II's lifespan. This reference is characterized by its larger 40mm case, improved movement (caliber 3186), and the use of both Tritium and, later, Luminova luminous material. It's this transition period – specifically around 1998 – that gives rise to the rare and highly collectible Explorer II models we'll be examining in detail.
The Rolex Explorer II Bezel: Function and Form
The bezel of the Rolex Explorer II is not merely a decorative element; it's an integral part of the watch's functionality. The fixed 24-hour graduated bezel, with its distinct markings, allows for easy timekeeping in challenging conditions. The bright luminous markers on the bezel, initially Tritium and later Luminova, ensure readability even in low-light situations. This crucial feature makes it possible for explorers to track both AM and PM hours, a vital tool for navigating in caves or other environments where the standard 12-hour display might be insufficient.
Rolex Explorer II Bezel Problems: A Rare Occurrence
While Rolex watches are renowned for their durability and reliability, potential issues with the bezel can arise, although they are infrequent. The most common problem reported by owners of older Explorer II models is fading of the luminous material, particularly with Tritium lume. This is a natural process that occurs over time due to the radioactive decay of Tritium. With the 16570 models produced around 1998, the transition to Luminova addressed this issue to a great extent, though even Luminova can degrade over time, albeit much more slowly. Other potential bezel problems are extremely rare and usually associated with accidental damage, such as impacts that might chip or damage the bezel insert.
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