The Rolex Explorer II, a stalwart in the brand's professional line, is more than just a timepiece; it's a testament to Rolex's commitment to precision and durability. Designed with the rigors of cave exploration in mind, its robust construction and highly legible dial are key to its legendary status. One element contributing significantly to this legibility are its hour markers. But what are these crucial components actually made of? Understanding the materials used in the Explorer II's construction, especially its dial markers, reveals much about the watch's history, evolution, and enduring appeal. This article will delve into the specifics of the hour markers, exploring their composition across different Explorer II models and the reasons behind Rolex's material choices. We'll also touch upon other key features of the watch, providing a comprehensive overview of this iconic tool watch.
Rolex Explorer II Models and the Evolution of Hour Markers:
The Rolex Explorer II's history is rich and varied, with several iterations reflecting advancements in horological technology and design aesthetics. Understanding the different models is crucial to understanding the evolution of its hour markers. Let's briefly explore some key models:
* Rolex Explorer II 1655 (1971-1984): This is the original Explorer II, often considered the most collectible due to its unique features. The 1655 featured large, luminous hour markers, primarily crafted from tritium. Tritium, a radioactive isotope of hydrogen, provided excellent luminescence, crucial for low-light conditions encountered during cave exploration. However, due to safety concerns surrounding tritium's radioactivity, Rolex eventually phased it out. The 1655's markers are typically characterized by their creamy, aged lume, a highly sought-after characteristic among collectors. The variation in lume color across different 1655s is a testament to the aging process and the inherent properties of tritium. This model also features a distinctive orange 24-hour hand, further enhancing its readability.
* Rolex Explorer II 16570 (1984-2011): This model marked a significant shift, replacing tritium with luminova. Luminova is a non-radioactive, phosphorescent material that offers excellent brightness without the health risks associated with tritium. The hour markers on the 16570 are generally larger and more substantial than those on the 1655, and their luminescence is notably different. While tritium lume tends to have a warmer, creamier tone over time, Luminova often retains a brighter, more consistent glow. The 16570 also saw refinements in the case design and movement, showcasing Rolex's ongoing commitment to improvement. This model is popular for its balance of classic design and modern functionality.
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