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.
I did not introduce Da Vinci watch before, however, like IWC Portofino, Da Vinci is also the style I like, its simpleness attracted a lot of watch fans who love simple dress watches with a little vintage style. Like Portuguese, Da Vinci is also regarded as complicated watch of IWC, especially those old models they published before that have a lot of complicated functions such as perpetual calendar. The watch I am going to review is a replica IWC watch, it is IW356601 and made by TW, which is a factory opened by Taiwanese in our market. This IWC Da Vinci replica is powered by Swiss ETA 2892 automatic movement and has hours, minutes, seconds and date functions. Check more specification below.TW factory also makes high quality gold Rolex replicas. It is a great maker in Guangzhou watch market. The watch case is made of 316L stainless steel, it is measured to be 40mm in diameter and 10mm thick, featuring a round bezel that has a smooth polishing. The case has moveable lugs, this is a smarter design and could make the case fit your wrist comfortably. For this simple and ordinary watch, I think it is more suitable for women, while if you guys are searching for such type of timer with some retro design on dial, this watch is your best choice.
