Posted on: December 8, 2021 Posted by: yvonne Comments: 0

When Pan Am launched the first direct trans-continental flight between New York and Moscow in 1959, the crew wore Swiss Rolex Oyster GMT-Master watches. With a clear display of the time in two time zones, it became the official watch of Pan Am, the most famous airline in the golden age of civil aviation, and was widely accepted as a must-have chronometer by pilots.
In 2013 Basel World Watch and Jewelry Expo, Rolex launched a new 904L stainless steel oyster GMT-Master II watch, its rotating outer ring for the first time using blue and black CERACHROM ceramic word ring, blue on behalf of the day, black on behalf of the night.
The new CERACHROM ceramic ring is a technical and aesthetic achievement of Rolex. It combines two different colored ceramic materials into a single ceramic ring using a patented technology developed by Rolex. This design echoes the traditional two-colour outer ring of the first GMT-Master II watches.
CERACHROM ceramic ring was invented in 2005. It has strong scratch and corrosion resistance and does not fade even under ultraviolet light. Its surface is polished by diamond and has excellent luster. A thin layer of platinum was filled with rolex PVD (Physical vapor Deposition) plating technology within the 24-h progressive scale of the character circle.
The Oyster case of the GMT-Master II, with a diameter of 40mm and water resistance up to 100m (330ft), is an example of rugged elegance and perfect proportion. The distinctive middle case is made of original 904L stainless steel with strong corrosion resistance. The triangular pit bottom cover is tightened by the Rolex watch maker with the brand’s own special tools, so that the case is completely sealed. The upper chain crown adopts the patented triple lock triple waterproof system, firmly screwed to the case, and is protected by a middle case connected as one of the crown shoulder. The mirror is made of scratch resistant blue crystal, with a small convex lens at 3 points, which is more convenient to read the date. The fully sealed Oyster case provides optimum protection for the Greenwich II’s highly accurate movement.
It adopts 3186 automatic chain machine movement completely developed by Rolex, equipped with calendar window and second time zone display function. Like all Rolex constant motion movements, the model 3186 movement has been certified by the Swiss Official Chronometer Certification, which is awarded to a precision watch successfully tested by the Swiss Chronometer Testing Center (COSC). The exquisite design of this movement and the high quality of the production process make it has unparalleled accuracy and reliability. The heart of the watch, the balance swing component, is made from Rolex’s patented blue PARACHROM wool and an alloy cast exclusively by Rolex. This gossamer is not interfered by magnetic field, it can still perform stably under temperature change, and its seismic strength is up to 10 times that of traditional gossamer.
The watch is equipped with 904L stainless steel solid link oyster watchband with oyster safety buckle, which can prevent the buckle from opening accidentally; Rolex’s patented easy to adjust chain link extension system is also installed on the buckle, making the strap easily extended by about 5 mm, making it more comfortable to wear under all conditions.

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