The Rolex GMT-Master II is a legend, a watch synonymous with travel, adventure, and unparalleled horological craftsmanship. Within the vast landscape of GMT-Master II references, the 78790 and its successor, the 78790A, occupy a specific niche, representing a period of transition and subtle, yet significant, design evolution. This article will delve deep into the differences between these two references, exploring their features, history, and current market value, providing a comprehensive guide for both seasoned collectors and prospective buyers. We’ll also touch upon related topics, including a Rolex 78790A review, Rolex GMT Master II pricing, the GMT Master II manual, comparisons with the 16710, GMT adjustment procedures, the meaning behind the GMT Master name, and a closer look at the 78790A's iconic bracelet.
Rolex 78790A Review: A Refinement of a Classic
The Rolex GMT-Master II reference 78790A represents a refined iteration of its predecessor, the 78790. While superficially similar, closer inspection reveals key distinctions that contribute to the 78790A's desirability among collectors. The most significant difference lies in the movement. The 78790 housed the caliber 3185, a robust and reliable movement known for its accuracy and longevity. However, the 78790A upgraded to the caliber 3186, a further refined version offering improved performance and enhanced shock resistance. This upgrade is not merely incremental; the 3186 boasts superior anti-magnetic properties and a slightly increased power reserve. These improvements reflect Rolex's unwavering commitment to pushing the boundaries of horological excellence.
Beyond the movement upgrade, subtle aesthetic changes distinguish the 78790A. While both feature the iconic black bezel and dial, the 78790A often showcases a more refined and polished finish, particularly noticeable on the case and bracelet. The subtle differences in the dial’s printing and the lume plots also contribute to the perceived upgrade. These minor adjustments, while seemingly insignificant at first glance, contribute to a more refined and luxurious overall feel. The 78790A also often features updated bracelet end links, further enhancing its overall aesthetic.
78790 vs 78790A: What's the Difference?
The core difference between the Rolex GMT-Master II 78790 and 78790A boils down to the movement and subtle refinements in finishing. The 78790, while a highly capable watch, utilized the caliber 3185 movement. The 78790A, on the other hand, incorporated the improved caliber 3186, representing a significant leap in terms of performance and reliability. This improvement in the movement alone justifies the increased value often associated with the 78790A in the secondary market.
Beyond the movement, the 78790A exhibits subtle enhancements in case finishing and bracelet details. These refinements, while not always immediately apparent, contribute to a more polished and refined overall aesthetic. The differences are subtle, but experienced collectors can readily distinguish between the two references. The 78790, while still a highly sought-after watch, is generally considered the earlier and slightly less refined version compared to its successor.
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