The Rolex 5517, often referred to as the "MilSub," holds a legendary status among watch collectors. Its mysterious origins, limited production, and rugged design have cemented its place as one of the most sought-after vintage Rolex models. A key element contributing to its allure is its case size: a robust 40mm diameter. This seemingly simple dimension tells a story of functionality, durability, and the specific demands of its intended users – the British Royal Navy. This article will delve into the specifics of the Rolex 5517 case size, exploring its context within the broader specifications of the watch, its history, and its current market value.
Rolex Full Spec 5517: A Technical Overview
The Rolex 5517, unlike its more widely known Submariner counterparts, doesn't boast a readily available, official specification sheet from Rolex. Much of its technical detail has been pieced together through meticulous research and examination of existing examples. However, we can compile a comprehensive overview based on known information:
* Case: Stainless steel, constructed to withstand the harsh marine environment. Its screw-down case back provides crucial water resistance. The case number, 5'212'927, is an internal Rolex reference, further highlighting the watch's unique status within the brand's history.
* Case Size: 40mm diameter. This size was considered substantial for its time, reflecting the need for a robust and easily legible timepiece in challenging underwater conditions.
* Crystal: Typically a thick, scratch-resistant acrylic crystal, offering superior impact resistance compared to sapphire crystals used in later models.
* Movement: Generally equipped with a Rolex calibre 1570 or 1575, known for their reliability and accuracy. These movements were workhorses, built to endure the pressures of deep-sea diving.
* Dial: The dial features a characteristic matte finish, often with luminous markers and hands for optimal readability in low-light conditions. Variations exist, with different hand styles and marker configurations adding to the watch's collectible appeal.
* Bezel: A unidirectional rotating bezel, crucial for tracking dive times. The bezel insert is usually a black aluminum insert, prone to wear and fading over time, contributing to the unique patina of vintage examples.
* Crown: A large, screw-down crown, ensuring water tightness.
* Closure: The 5517 was famously issued with a NATO strap, a durable and practical choice for military use. This contrasts with the oyster bracelets typically found on other Submariner models.
Rolex Submariner Military 5517: A History Steeped in Mystery
The 5517's history is shrouded in some mystery. While Rolex didn't officially market the watch, it was undeniably supplied to the British Ministry of Defence (MoD) for use by the Royal Navy's divers. This explains the choice of the robust NATO strap over the more luxurious oyster bracelet. The NATO strap provided superior security and quick release capabilities, crucial features in demanding underwater operations.
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