The Rolex Explorer II, particularly the reference 216570, stands as a testament to the brand's commitment to robust functionality and enduring design. This iconic timepiece, often sought after in the used Rolex explorer watches market (and readily available among used Rolex explorers for sale and used Rolex watches for sale listings), boasts a distinctive crown and a highly reliable caliber that have cemented its place as a favorite among adventurers and watch enthusiasts alike. This article will delve into the specifics of the 216570's crown and caliber, exploring their design, functionality, and significance within the broader context of Rolex horological excellence. We'll also touch upon the appeal of purchasing a pre-owned example, such as the 10-10-ROL-1986YK watch mentioned.
The Crown: A Symbol of Robustness and Control
The crown of the Rolex Explorer II 216570 is more than just a means of setting the time and winding the movement. It's a carefully engineered component that reflects the watch's rugged nature and its ability to withstand the rigors of extreme environments. Unlike some other Rolex models, the Explorer II's crown features a significantly larger profile, making it easier to grip and manipulate even with gloves on – a critical feature for its intended use in challenging conditions. This oversized crown is a hallmark of the Explorer II line, immediately distinguishing it from its Explorer sibling and other Rolex models. The increased size isn't merely for aesthetics; it directly contributes to the watch's water resistance and overall durability.
The crown's design incorporates Rolex's patented Triplock triple waterproofness system. This system consists of three separate seals that work in concert to prevent water ingress. The first seal is located between the crown and the tube, the second within the crown itself, and the third within the crown tube. This triple-layered protection ensures that the watch maintains its water resistance, even under significant pressure. The screw-down crown mechanism further enhances this water resistance, securely sealing the watch when not in use.
The crown's knurling, the textured surface providing grip, is meticulously crafted. The fine, evenly spaced grooves offer excellent tactile feedback, allowing for precise adjustment of the time and date, even in low-light conditions or when wearing gloves. This attention to detail is indicative of Rolex's commitment to creating a tool watch that performs flawlessly under pressure. The materials used in the crown's construction are also crucial to its durability. Typically made from high-grade stainless steel, the crown is resistant to corrosion and wear, ensuring longevity even under harsh conditions. The robust construction of the crown is a key reason why the 216570 remains a sought-after model among collectors and adventurers alike.
Caliber 3187: The Heart of the Explorer II
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