The Rolex GMT-Master II reference 16710, affectionately known by collectors as the "Coke" (for its red and black bezel) or "Pepsi" (for its red and blue bezel), holds a special place in the hearts of watch enthusiasts. Its iconic design, robust construction, and versatile functionality have cemented its status as a modern classic. But beyond the instantly recognizable aesthetics lies a sophisticated and reliable movement: the Rolex Calibre 3185 and its successor, the Calibre 3186. This article delves into the intricacies of these movements, exploring their features, evolution, and significance in the context of the coveted 16710. We will also touch upon various aspects related to buying, selling, and valuing this highly sought-after timepiece.
Movement & Complications of The GMT-Master II 16710
The Rolex GMT-Master II 16710 is powered by the self-winding mechanical caliber 3185, later superseded by the Calibre 3186. Both movements are variations on the same fundamental design, sharing a high level of precision and robustness synonymous with Rolex. These movements are not merely timekeeping mechanisms; they are complex pieces of engineering designed for exceptional performance under diverse conditions. The core complication is, of course, the GMT function. This allows the wearer to simultaneously track two different time zones. A fourth hand, independently adjustable via the crown, circles the dial once every 24 hours, indicating a second time zone. This is achieved through a clever arrangement of gears and levers within the movement. The bidirectional rotating bezel, with its 24-hour graduated markings, complements this functionality, allowing for intuitive setting and reading of the second time zone.
The Calibre 3185, introduced in the late 1980s, served as the foundation for the 3186. While outwardly similar, subtle internal improvements distinguish the two. The 3186, introduced later, incorporated minor enhancements focused on improving longevity and overall performance. These refinements often involved adjustments to the escapement, pallet fork, and other crucial components, leading to increased shock resistance and smoother operation. Precise details of these modifications are largely kept confidential by Rolex, maintaining an element of mystery around their precise engineering advancements. However, owners and collectors often report a slightly enhanced feel and improved stability in the 3186 compared to its predecessor.
Both movements boast a significant power reserve, typically around 48 hours, ensuring reliable timekeeping even if the watch is not worn for a short period. This substantial power reserve is a testament to Rolex's commitment to creating robust and dependable timepieces. The movements are also equipped with a paramagnetic hairspring, providing greater resistance to magnetic fields, a crucial feature in today's increasingly electromagnetic environment. The automatic winding mechanism, utilizing a rotor, efficiently winds the mainspring with the wearer's movements, eliminating the need for manual winding. This self-winding mechanism is exceptionally efficient, ensuring the watch maintains a full power reserve with minimal wrist movement.
The finishing of the movement itself is exemplary. Rolex is renowned for its meticulous attention to detail, and the Calibre 3185/3186 reflects this dedication. The components are meticulously crafted and decorated with techniques such as perlage (circular graining) and Côtes de Genève (Geneva stripes), showcasing the high level of craftsmanship involved. While these details are not visible through the caseback of the 16710 (unless it's been opened for servicing), they represent Rolex's commitment to quality in every aspect of their watchmaking.
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