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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).

Sticking with undersea operations, the Oris ProDiver collection is an interesting one, given that Oris is one of the few watch companies that remains actively engaged in dealings with commercial divers. More specifically, Roman Frischknecht is a commercial diver that has been an Oris ambassador for some time, and rather than simply being an ambassador in name, Roman has played a crucial role in the development of the ProDiver collection ahead of its launch in 2009.It was his insight that led to the creation of the brand’s bezel locking system, known as a Rotation Safety System. Given the level of safety and security protocols involved in his line of work, Roman knew that if he was to be using a conventional dive watch in a modern dive environment, there could be absolutely no room for error, thus a locking mechanism (as seen in other divers like the Omega Ploprof, among others) would be mandatory.Although the roots of the Yacht-Master II relate to activities on the water’s surface rather than deep below, its unique functionality is perfectly suited to this category. After all, the Rolex Yacht-Master II is what is often referred to as yachting timer – a countdown chronograph that can be used to properly measure the start time of a regatta, also known as a sailing race.Arguably the most complex watch in the present Rolex collection, the Yacht-Master II uses an interesting combination of bezel position, crown position, and pusher action in order to set its countdown duration between 1 and 10 minutes, with the chronograph capable of flyback (or fly-forward) functionality to the pre-set time with a single activation of its lower pusher. While many Yacht-Master II wearers are unlikely to ever use this highly specific function for its actual intended purpose. being able to run a countdown like this isn’t shy on practical daily-life applications… grilling timer, anyone?

IW356501 replica is really so charming, which can make you have great improvement not matter the feeling of touch or vision. It may bring to you a special experience that you never get through before. In my point, this nice replica IWC is very suitable for businessmen, it will reveal the temperament of gentlemen fully, you deserve to own one.

This replica watch has elegant temperament and simple appearance as a whole. It still with the classic dial style of IWC, which may have ultra big diameter, yes, it has 44.5mm. Its case was made of solid stainless steel 316. There are steel rail-mounded minute scales on the black dial. The hour hand was steel leaf hand which was the representative of elegance. The slender hands help us to read time clearly. What’s more, it has set a seconds sub-dial at 6:00 position. The transparent sapphire crystal was so clear and can be wear resistant. Correspondingly, the case back also used this crystal. This considerate design gave us a precious opportunity to observe the operation of movement clearly. This replica matched with a black leather strap, even its stitch was also black. Along with the black dial which has steel hands inside. I think it can highlight your shrewd and capable temperament obviously when you wearing this wrist watch. The thickness of case only has 11.5mm, really thin in shape, which may be more fit for wrist with comfortable wearing experiment.

This replica with a big white dial,42.3mm, it is easy to see time having this design, and collocates with blue hand, it can up its charming glamour and be more attractive at the same time. There are some details also reveal the symbolic design of Portuguese collection fully. For example, its dedicated minute ring is liked track, the relief Arabic numerals, the dedicated leaf hand. What’s more, combined with white dial and blue hand, it is really more vivid as a whole with this detail. Almost all these details are designed for gentlemen specially.