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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).

But as so often happens, any objections were short-lived. Fairly soon after its arrival, the LV (standing for Lunette Verte, or green bezel) started attracting much more of the right kind of attention, with devotees learning to appreciate the eccentricities. It also had the definite whiff of a future classic, something that set collectors with one eye on future monetary gains to gravitate towards it.As it turned out, they were right. Just seven years after its introduction, the Kermit was withdrawn to make way for the ref. 116610LV. Now housed in the beefed-up Super Case, this new piece added a green dial to match the bezel, leading to it being known colloquially as the Hulk.A short run of an unusual edition of a true industry giant has seen prices for the Kermit far outstrip the equivalent classic black models, and should be set to only get higher with time. Definitely one to consider.This one is a real puzzler. There hasn’t been a black and red bezel GMT-Master (much better known as the ‘Coke’) since 2007. That was when the last reference to offer the option, the ref. 16710, was scrubbed from the lineup. This means that there has never been a Cerachrom example of this archetypal and hugely popular Rolex color scheme, which we originally saw debut on the very first of the GMT-Master II references way back in 1983, the ref. 16760 (nicknamed the ‘Fat Lady’).The red and black had enough of a distinction from the blue and red bezel pieces to warrant its place, and as we all know, the ‘Pepsi’ has been (and still is) a massive seller for the brand.

I have reviewed several Omega watches on my blog, they are all Planet Ocean models, which are the latest modern Omega Seamaster collection. If you are looking for something that is in the blood of Omega Seamaster, then this one is. The watch here is an Omega that has inherited the most authentic features of Seamaster 300 series, but its design also meets the aesthetic view of modern people. The watch being reviewed is an ultimate replica, I do not know which exact factory it is from, but its quality and replicating level are very high, which could be even compared with Blancpain Fifty Fathoms from Noob factory. The replica Omega is in black, there is also a blue version.It is the best 41mm Omega replica watch I have ever seen. 316L stainless steel case has polished lugs on front, the sides are brushed. The wave-shaped bezel is different from Rolex Submariner’s small clicks. The bezel is rotatable and has white deep engravings on the ceramic insert. Please check the pearl on the bezel, it is also different from Submariner’s, the latter looks more raised and round. Seeing from the side, the case is cut very well and has beautiful arc lines. The crown, which is protected by two steel guards, seems to be better integrated into the case. On the other side of the case, there is another crown at 10 o’clock, it is for Helium valve release.

The Rolex Two-Tone Submariner 16613 is available on a flat-link Oyster bracelet with hollow 18 karat yellow gold center links and an Oysterlock clasp. Like other Submariner watches, the clasp on the ref. 16613 features a wetsuit extension system that allows the length of the bracelet to be adjusted on the fly to fit comfortably over wetsuits.Depending on the year of production, Submariner 16613 bracelets can be found with slight differences between their clasps, end-links, and wetsuit extension systems. Earlier examples will have hollow end-links, all-steel clasps, and stamped wetsuit extensions, while later-era 16613 Submariner bracelets will have solid end-links, a link-style extension system, and a clasp featuring a 18k yellow gold strip through the center.The ref. 16613 is the result of Rolex’s tireless quest for perfection. Its long production run has spawned several variations, making it a fun watch to “hunt” for on the pre-owned Rolex market. It’s also a popular choice for its stunning two-tone steel and gold finish, and it is an excellent option for anyone who seeks a gold Rolex sports watch without the hefty price tag that accompanies an all-gold watch.