The chemical composition of synthetic green sapphire includes copper and aluminum oxide, with the copper being the element that is ultimately responsible for its signature green hue. The process of synthetic sapphire production is an expensive and exacting one; however, the additional obstacles that accompany the addition of copper – and the precision required to achieve the right amount of green tint without compromising the strength or clarity of the crystal are likely responsible for its exclusive use on the Rolex Milgauss line of watches.When synthetic sapphire is manufactured, the material has to “grow” over the course of a period of several weeks. Particles attract to one another, forming layers that fuse together to create a dense and ultra-hard substance. The end result of production is a “boule” – a solid piece of synthetic sapphire shaped like a chunky cylinder, which is then cut and shaped to its necessary dimensions.Due to the high costs of production, most watch crystal manufacturers cut their synthetic sapphire boules in a perpendicular fashion, as to maximize the number of crystals that can be created from a single boule. Although this is entirely unconfirmed, it is rumored that Rolex cuts the boule along a diagonal axis to maximize the clarity and strength of the finished crystal. In addition to complicating the cutting and shaping process itself, cutting the boule along a diagonal axis significantly increases the amount of waste, which further adds cost to an already expensive manufacturing process.Despite not making an appearance until just over ten years ago, the green sapphire crystal has quickly become one of the defining characteristics of the Milgauss line. Its pale green tint possesses no functional advantages over a traditional, clear/uncolored synthetic sapphire crystal; however, the green crystal that is exclusively fitted to the Rolex Milgauss 116400GV is one of the primary reasons that individuals seek out this particular reference. The green crystal is something entirely unique to the Milgauss collection and is not something that is found on any other Rolex watch, past or present.
Two important IWC watches are just published by ZF factory in our market, they are from Pilot chrono series of IWC, Top Gun IW389001 and IW389002. Both watches use ceramic case and military-style nylon band. They are good choices for military watch fans. Here I post specification of these two watches.Movement: Asia Valjoux 7750, Real Chronograph Function Case: 44mm*17mm, High Quality Imported Black Ceramic Crystal: Sapphire with Swiss Standard AR Coating Dial: IW389001 with Black Dial, IW389002 with Green Dial. Green Superlume on Markers and Hands Bracelet: Nylon Clad Calf Leather Strap with Deployant Clasp Water Resistant: 30m Both replica watches have black ceramic case that is brushed, whether in the front or sides, the entire case is brushed, both chronograph buttons are also brushed with polished round edge. The case diameter is up to 44mm, because of ceramic material, the case feels heavy. Case back has correct engravings in brushed surface, there are “TOP GUN” sculpture and other engravings.
Titanium is the material of choice for the inner caseback on the Deepsea due to its strong corrosion-resistant properties and its ability to repeatedly flex under stress without developing the same degree of metal fatigue as steel. Since the crystal on the Deepsea will be subjected to the same extreme pressures as the caseback, its scratch-resistant sapphire crystal has been beefed up to be a massive 5.5mm thick, and it is crafted in a domed shape (without a Cyclops magnification lens) to better distribute the pressures being exerted on the face of the watch.Like both the Submariner and the normal Sea-Dweller, the Deepsea is equipped with Rolex’s Triplock winding crown that screws down and uses a system of gaskets to create three sealed zones to protect against moisture intrusion. Additionally, since the Deepsea is a variation of Rolex’s Sea-Dweller collection, its case is equipped with a helium gas escape valve, which allows the watch to safely be used for saturation diving applications.One of the hallmark characteristics of modern dive watches is the degree of the over-engineering present in their designs and the almost-ludicrously excessive performance-statistics that manufacturers are able to achieve. Although the Rolex Deepsea Sea-Dweller is easily the most capable and robust dive watch available in Rolex’s current catalog, only a very slim percentage of its owners will ever require even a small fraction of its incredible underwater functionality. Regardless, the Ringlock system and the case of the Deepsea are the perfect embodiment of form following function, as the watch was specifically designed from the ground-up to be the ultimate deep-sea diving timepiece.
When we turn back the replica, we will admire its amazing back-case. Generous, this is the only word I want to express. We can review the beauty of machine accompany with the moving of balance wheel clearly in such big back-case. It is liked that we are admiring a wonderful artwork.Next, let’s see its band and clasp. A good band need to be comfortable and durable in quality. So the replica has do it so well in this detail, a folding clasp with classic 316 stainless steel and has IWC LOGO in it. It reveals the taste of gentlemen and active sport style fully.In the end, Let’s see an important element, this IWC Portuguese replica is equipped with a powerful movement, it is high clone CAL.51011, can keep over 120 hours power reserve. If normal watch, uses ETA movement, mainly can keep about two or three days. So this replica is really an excellent one with high copy technology.In my point of view, this replica is deserve to have one, it is not so luxurious and complicated, but is elegant and dedicated. You need to have such replica as your special artwork in hand.
