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.
While bidirectional rotating bezels may be quicker for wearers to turn to the appropriate spot, as a dive bezel it’s not the best option. If the bezel gets accidentally knocked, this could cause divers to miscalculate how long they have been underwater. Therefore, a unidirectional bezel is more prudent because accidental knocks to the bezel can only result in overestimating immersion time – it’s far preferable to start ascending to the surface earlier or spend longer than necessary at a decompression stop.Rolex began equipping the Submariner with unidirectional bezels starting with the Submariner Date ref. 16800, which was introduced around 1979. The no-date Submariner model received a unidirectional bezel with the introduction of the Submariner ref. 14060 in 1990.Like the previous generation, the new unidirectional bezels included aluminum bezel inserts. In 1983, Rolex introduced the first two-tone Submariner model in the form of the Submariner Date ref. 16803, which sported a yellow gold knurled bezel with a black or blue aluminum insert. To celebrate the 40th anniversary of the Submariner in 2003, Rolex introduced the stainless steel Submariner Date ref. 16610LV with a green bezel insert.In 2008, Rolex introduced the first Submariner models equipped with unidirectional bezels featuring Cerachrom inserts. Cerachrom is Rolex’s proprietary ceramic alloy that is not only resistant to scratching but also to fading. The 60-minute graduations are cut into the bezel and then the ceramic bezel insert is fully coated with either yellow gold (for yellow gold and two-tone models) or platinum (for white gold or steel models). The gold/platinum is then polished away from the ceramic surface until only the recessed numerals and markings are left with the metal filling.By 2012, Rolex had rolled out the Cerachrom bezels across all Submariner models and color options include black, blue, and green. A quick way to know the color of the bezel is to look at the letters in the reference number: LB (blue bezel), LN (black bezel), and LV (green bezel).
A lot of people – even seasoned collectors – can find themselves confused when trying to distinguish between original and authentic watches. The trick? Stop thinking of the words as synonymous. In this guide, you’ll learn about the big differences between these two categories of luxury watches and how it can help you be a more educated shopper and collector.An authentic watch is undisputed in origin, and not a replica or copy. This means that in order for something to be authentic, it has to be 100% real. Authentic watches are genuine pieces from brands – think of the big players like Rolex, Tudor, Omega, Patek Philippe and more.We use the word authentic in the industry to distinguish between genuine timepieces and fakes that are widely copied and sold. When a dealer gets their hands on a watch, the first thing they are going to do is check the authenticity of the watch; and as a buyer, you should be doing the same. As a buyer, the first step in guaranteeing you get an authentic watch is by always buying directly from the brand or a trusted and reputable dealer who can ensure that the watch is authentic.But how can you tell whether a watch is authentic? Well, we’ve created some great guides to help educate buyers and collectors – both on what’s real, and how to spot inauthentic details. Head over here to check out our official guide on the Top Ways To Spot A Fake Rolex.To be an original watch, the timepiece has to be an authentic watch. Because when you see a watch listed as original, it means that it is both a genuine timepiece from that brand, and one that has not had any later-era updates or alterations since it was manufactured and originally sold.Original watches are:Authentic Have not had parts replaced with later-era equivalents or been modified/altered in any way Sometimes in the industry, we also refer to original watches as ‘honest’ watches. And when we look at pre-owned timepieces – especially vintage watches, we often look for originality. This means we look for things like correct factory-installed parts, whether they’re scratched, chipped or faded.We also look for things like custom details that were added after purchasing, like diamonds or enhanced bezels which were later-era additions and unoriginal to the piece. There are even many buyers and collectors who will favor watches that have never had a polishing or servicing that could have hindered the natural aging process of the timepiece.
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