The green-tinted sapphire crystal fitted to the reference 116400GV Milgauss has quickly become one of the defining characteristics of Rolex’s anti-magnetic line of watches. The Rolex Milgauss was first introduced in 1956; however, it was not until 2007 that it received its now-signature, green sapphire crystal – an exclusive feature that was originally introduced as a way for Rolex to celebrate the 50th anniversary of their Milgauss line.No other watch in Rolex’s current catalog is fitted with a green-tinted (or any other color) sapphire crystal. However, at the present time, all Milgauss watches that are currently in production leave the factory with green sapphire crystals. Rather than simply being a layer or coating, the light green tint is present throughout the entire material of the crystal, and will not fade or discolor after prolonged wear and use.Rolex claims that it took them many years of research and development to master and perfect the secret procedure of manufacturing their green-tinted sapphire crystals and that the actual process of producing the crystals takes multiple weeks. What is most interesting is that despite a usual eagerness to patent their various in-house technologies, Rolex claims that the green sapphire crystal in the Milgauss is “not patented, as it is so difficult to make that no one else would even venture to try.”Rolex will never reveal their exact formulas and secrets about how they manufacture the green-tinted sapphire crystals fitted to the Milgauss; however, we do know some general information about green-colored synthetic sapphire and the production of sapphire watch crystals as a whole.There are a number of different ways to produce synthetic sapphire, all of which fall into the following general methods of production: melt growth, solution growth, and high-temperature/high-pressure growth. It is hypothesized that Rolex uses a hydrothermal method of production for its synthetic sapphire crystals, which is slow, expensive, and uses heat and pressure to imitate the conditions present deep inside the earth that is responsible for the production of naturally-occurring crystalline gemstones.
There are also other dial details that tell this Sea-Dweller from others, that is its hour markers are unique, they are oval-shaped, expect a triangle at 12 and other two bar shapes at 6 and 9. All hour markers are a little yellow not white. Minute scales are thin sticks in white. There is a date window positioned at 3, black date font in white background. “SWISS – T < 25” at 6 instead of “SWISS MADE”.Black bezel is bi-directional rotating like genuine. The case back has special engravings curved, including Rolex Lgo, and words of “ROLEX”, “ROLEX PATENT . GAS ESCAPE VALVE . OYSTER”. The case back is also screwed down like modern Sea-Dweller, you can see there are some digital numbers engraved on the back side of the bracelet, I do not know what meaning. The replica 1665 is equipped with an Asian clone ETA 2846 movement, it has 17 jewels and beats at 21600 times per hour, I have done a movement test, like the picture said, only 7 seconds inaccuracy each day.Specifications: Movement: Asian Clone ETA 2846, 17 Jewels, 21600bph Case: 40mm*13mm, 316L Stainless Steel, Bi-directional Black Bezel Crystal: Plexi Plastic Dial: Black with Dot Hour Markers Bracelet: Solid Steel Oyster Bracelet with Diver’s Extension Water Resistant: 30 Meters In recent times, I have written a lot about Rolex watches and most of them are vintage Sub and Explorer, they got a great response on my blog, many readers asked how to buy it and encouraged me to written more things about those vintage watches. Yes, I will keep doing my work to introduce more fantastic replica watches, besides, all advice I have given to you is honest, there are a lot types of replica watches in the market, each type varies in quality, I just hope you to get the most high-end ones.
