The Rolex GMT-Master II, a legendary timepiece synonymous with aviation and global travel, boasts a rich history reflected in its diverse range of reference numbers. Understanding these numbers is key to appreciating the nuances of each model, from subtle variations in bezel design to significant changes in movement and case materials. This article delves into the intricacies of Rolex GMT-Master II model numbers, providing a comprehensive guide to decipher their meaning and navigate the complexities of the Rolex catalog. While we'll touch upon related models like the Rolex Datejust and even reference historical pieces like the 1675 and 6542, our primary focus remains the GMT-Master II and the information encoded within its reference number.
The Rolex reference number, a seemingly arbitrary string of digits, is a meticulously crafted code containing vital information about the watch. While the entire number provides a complete picture, individual digits often hold specific significance. One particularly important digit, the fifth, directly relates to the type of bezel fitted to the watch. This seemingly small detail can significantly impact the aesthetic and value of the piece. Let's break down the significance of this fifth digit and the bezel types it represents:
* 0: Smooth/Domed Bezel: This bezel type features a smooth, polished surface, often with a subtly domed profile. It offers a clean, classic aesthetic, frequently found on earlier GMT-Master II models and certain variations within current production lines.
* 1: Engine-Turned Bezel: Characterized by its fine, concentric grooves, the engine-turned bezel adds a textured, sophisticated touch. This type is commonly associated with certain GMT-Master II iterations, offering a visual contrast to the polished case.
* 2: Engraved Bezel: This bezel type features engraved markings, typically hour markers or numerals, often filled with luminescent material for enhanced readability in low-light conditions. The engravings themselves can vary in style and depth depending on the specific model.
* 3: Fluted Bezel: This bezel features a series of subtly raised, fluted sections creating a distinctive, tactile surface. While less common on the GMT-Master II compared to other Rolex models like the Datejust, it has appeared on certain limited editions or special variations.
* 4: Bark Bezel: The "bark" bezel, named for its resemblance to tree bark, presents a uniquely textured surface with irregular, slightly raised patterns. This is a less frequently encountered bezel type, often found on more exclusive or vintage GMT-Master II models.
* 5: Pyramide Bezel: This bezel type, indicated by the digit "5," is no longer in use. It was a less common design and is primarily found on older or vintage models.
Beyond the Fifth Digit: Deciphering the Entire Reference Number
While the fifth digit provides crucial information about the bezel, the entire reference number is essential for complete identification. Each digit, and the overall sequence, provides clues to the watch's specifications:
* The first digit(s): Often indicates the model family (e.g., 167x for earlier GMT-Master models, 1167x for later GMT-Master II models).
* Subsequent digits: Denote specific features such as case material (stainless steel, gold, etc.), dial variations, movement type, and year of manufacture.
Understanding the intricacies of the reference number requires extensive research and familiarity with Rolex's historical production records. Online resources like Rolex reference number lookup tools, Rolex model numbers charts, and dedicated forums can be invaluable in this process. However, it's crucial to exercise caution and verify information from multiple credible sources.
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