Rolex’s most colorful sports models are GMT-MASTER, that is, the Greenwich type-its development history is not shorter than SUB (Ref. 6204 in 1953), GMT Master was released based on Ref. 6202. In 1954, the two can be said to have an equal history. Compared to the appearance of a water ghost for a century, the biggest feature of Greenwich is that it is lively, changeable, and slender and lusty. The original intention of Greenwich’s design is to meet the needs of pilots. The outer ring is designed in two colors: half of it is red for day time, and the other half is blue for night time. The GMT needle uses bright red (more green and blue in the later period), and the outer ring is designed with a contrasting color of red and blue in half to enhance the visual effect. At that time, GMT was also designed for aviation pilots due to jet lag. In addition to the normal local time, the 24-hour hand can accurately display the difference between day and night. It can also cooperate with the rotating outer ring to quickly calculate the second time zone. In addition to the multi-colored outer ring, the GMT’s strap has both a commemorative strap and an oyster strap at the beginning, so the new five-bead strap is just a return to tradition. Maybe it will be replaced by an oyster strap. So don’t be surprised and urged to buy a new one. To say that the history of GMT is really difficult to interpret clearly, but first of all have a certain understanding of its model, the poison division made a simple form, which gave a brief introduction to each representative. It can be seen that the GMT-MASTER mid-section styles overlap. It can be said that there are two main lines: GMT-MASTER & GMT-MASTER Ⅱ. Why is there a difference between the two generations? The core lies in the difference between the movements leading to obvious differences in use: The GMT-MASTER movement has traditionally been designed in two places. The third gear is also the minute hand. In the 1980s, 16750 and 16760 began to distinguish between the first and second generations. The difference between the first and second generation 16750 is that the second generation 16760 uses the three-place time design (the first three-speed minute hand can still be adjusted while the GMT and hour hands can be adjusted at the same time. When the second gear is changed to adjust the hour hand alone, the GMT hand will not move; the calendar needs to be adjusted slowly before and after the hour hand), but the new second generation did not immediately replace the traditional one. The 16750 was upgraded to 16700; the second 16760 Upgrade to 16710. If the model is easy to confuse, you can note the change of the movement. Ca.l3075-3175 is the first generation, and Cal.3085-3185-3186 is the second generation. The reason why there is a process in which the second and second generations coexist is because the new and old designs have their own benefits. One is easy to adjust the calendar, and the other is a separate GMT hour hand. The GMT to be said today has a double-entry pair. The left is Ref.16710 and the right Ref.16753, which are all relatively small color circles. The black and red circles only appear at Ref. 16760, Ref. 16710; the black and gold circles are Ref. 16753, Ref. 16713, and Ref. 116713. Red is against the red circle, and gold is against the golden circle. It is worth noting that the model mark of the disc can be seen that Ref.16710 belongs to GMT-MASTER Ⅱ and Ref.16753 is a generation of GMT-MASTER. Ref.16710, which is often referred to as the Coca-Cola circle (Coke), is more stable than the Pepsi circle. The 24-hour outer ring is used with the 24-hour small red needle. The black background of Ref.16753 gold character is eye-catching and flaunting. With a five-bead chain, the yellow T25 luminous scale has a very deep retro effect, just like the 82-year-old Lafite. To be Oyste, or to be Jubilee, this is a question. In addition to color, choosing an oyster or a commemorative strap is another big problem for GMT. This is also the fun of GMT. The five-bead chain has made a comeback and brought a new trend. Truth is the Best, without human intervention, can maintain the original flavor of history. A big man once said: beautiful things are always similar, whether it is a plastic lens or sapphire, as long as it is not too much modification, it is really good. GMT has one more GMT function than SUB. In theory, the movement is more complex, but the case is more skinny: the middle is over the sides and the ends are excessive. As in calligraphy, there are fluctuations in the strokes, and the peaks must be retracted. The primitive Middle Ages can see the clear shoulder line, just like a woman’s incense shoulder, become a dazzling landscape. As for the back part, although the 16710 is wearing ears, it has adopted a solid lead, and the strap is more solid and durable. The 16753 itself is a five-bead chain design, coupled with the gold chain head connection, the strap is already difficult to straighten. If the new GMT GMT is launched next year, I believe that it will make a lot of work on the watch section, such as placing a ceramic chain bolt. Putting it together can clearly distinguish the differences between the 30 and 31 series movements. The poison master personally likes the 30 series Rolex. Relatively, it is very playable. You don’t need a high price to find a satisfactory style. The Ref.16800, Ref.16803, and Ref.16660 I wrote before are all 30 series movements, and the introduction has been said many times. The function of the 3185 movement when it comes with two places is also the current mainstream GMT watch design. The actual parts are not greatly changed, but it is really convenient to set the time of the two places separately. In 2018, Rolex launched the Ref.126710 red and blue style, and the movement was also replaced with a new 3285. It has been conservative in the performance of the 32 series movement in recent years. Although the polishing and design have been improved a lot, but from the perspective of stability when traveling, it does not reach the level that Rolex deserves. If you blame it, you blame the 31 series for its excellent performance. In addition to ordinary steel models, GMT’s product line is very complete, all gold and diamonds are commonplace, which also shows from the side that Greenwich is positioned higher than ordinary sports models (except for Daytona). If you really want to talk about all GMT-MASTER, it will take tens of thousands of words to make it clear. This article was originally created by the public account ‘Poison Table’. 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