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).
There are totally four watches of IW503502, three of them are in white stainless steel, the other one has a rose gold case. I will take the stainless steel model with black leather strap for example. The case is made of solid 316L stainless steel, which is measured to be 44mm in diameter, case thickness is 14mm. Round case and thin bezel make the dial look bigger, this is the classic case design of most dress watches. As one of the most popular dress watches, IWC Portuguese has a simple case and elegant dial design. The front face of the lugs are polished, both sided faces of the case are brushed, the arc of the lugs is improved, it is closer to genuine. Case back is see-through sapphire crystal.
The Daytona is equipped with an Asian clone ETA 7750 movement, which means Noob factory used a Chinese chronograph movement as a base movement, then modified its plates and rotor according to genuine ETA 7750, although the fake 7750 is not as accurate as genuine, the price of the replica tells you everything, besides, I have tested the movement with professional device, the inaccuracy is within 5 seconds each day.Overall, 116509 is the best-selling one among all stainless steel Daytona watches, and I never sell low quality and defective replicas to you.I introduced several Daytona watches on my site, there are steel Daytona, Rainbow Daytona and the most popular vintage Paul Newman Daytona, I like Daytona watch because it is the only Rolex that not only features sporty style but also made of precious metal. Rolex Daytona watch could fit your any types of dresses, like business suits or sports clothing. Many watch fans prefer those Rolex watches with steel bracelet, but I think the one with rubber band is also attractive. I prefer wearing Daytona watch, it is very convenient for me when I am doing some sports, the chronograph function is specially designed for those sports lovers who like competition. Today, I will introduce another fusion art, although many people Hublot is more worthy of this title, this Rolex Daytona is a good combination of precious metal and rubber material. This watch I am going to introduce in the following is Rolex Daytona 116518LN replica, it uses four materials, which include stainless steel, yellow gold, ceramic and black rubber. Now, let’s read its specification first.Replica Rolex Daytona 116518LN Movement: Clone Rolex 4130. Fullly functional Chronograph like real Rolex Daytona Case: 40mm*13mm. 18K Yellow Gold, almost 5 mils on 904L Stainless Steel Bezel: Black Ceramic Bezel Insert Crystal: Sapphire. Etched Rolex Crown at 6 Dial: Gold Color Band: Black OysterFlex Rubber Strap with Flip Lock New Style Clasp Water Resistant: 100m Replica Rolex Daytona Gold Watch.First, I must see it is a dream watch for many Rolex fans because the replica watch uses a lot of high-tech watch materials. The case is made of solid 904L stainless steel, you know, 904L steel is only used on genuine Rolex before, but now AR factory uses this steel material on replica Rolex, this is a great breakthrough in fake watch industry. There is a thick layer of 18K yellow gold on the case, it is about 5 mils, the wrapped gold coating, which will not fade easily, I have to say the gold coating will not be worn even after three years of wearing.
The earliest movement used in the Rolex Explorer II was the Caliber 1575, but over the years it was replaced with more technically advanced movements to help this watch reach its full adventure potential. The first big upgrade was the Cal. 3085 which allowed the 24-hour hand to be adjusted independently from the 12-hour hand. This meant the Explorer II no longer just indicated day and night hours, but could also be used to track a second time zone – turning it into a GMT watch. Then came the Cal. 3185 which was improved upon more with a Glucydur balance wheel that is not only paramagnetic but was resilient in extreme temperatures. The 3186 came next with a blue Parachrom hairspring that is anti-magnetic and shock resistant for even better durability. Finally, we have the modern-day Cal. 3187 which features all the upgrades this watch has gained over the years – from the GMT functionality to the blue Parachrom hairspring. It’s also notable for its high-performance Paraflex shock absorbers, 31 jewels, -2/+2 seconds per day accuracy and 48-hour power reserve.The Submariner has a much longer history, so we’re going to start with the automatic Caliber 3135, which, while upgraded over the years, has been used in all date-displaying Submariner watches since 1988. While the aesthetics of the Submariner can vary, the Cal. 3135 has remained a trusted source of power for this beloved timepiece because of its sheer reliability. Today, the upgraded Cal. 3135 movement is COSC certified, outfitted with the anti-magnetic and ultra shock-resistant blue Parachrom hairspring, and boasts an impressive 48-hour power reserve just like the Explorer II.
At the heart of the Deepsea’s case is Rolex’s patented Ringlock system, which uses a super hard, nitrogen-alloyed steel central ring to internally support both the extra-thick sapphire crystal and the Grade 5 titanium caseback. While the Ringlock system is largely responsible for the overall increase in the case size of the Deepsea, it actually enables the watch to be smaller than it otherwise would be, had it were to follow a more traditional case design while still retaining its same colossal depth rating.The primary purpose of the Ringlock system is to reduce the amount of stress placed on the case of the watch. As pressure on the watch increases at greater depths, the majority of it gets exerted on the front and back surfaces of the watch. Since the nitrogen-alloyed stainless steel compression ring internally supports both the crystal and the caseback of the Deepsea, the amount of force exerted on the actual case itself remains relatively minimal. Additionally, as the crystal and caseback get squeezed together, with the majority of the force being supported by the internal compression ring, the front and back gaskets of the watch get pressed together, ensuring an extra tight seal.The caseback on the Rolex Deepsea consists of two components: an inner caseback made from Grade 5 titanium, and an outer, screw-down caseback ring that is constructed from Oystersteel (904L stainless steel). With a traditional, single-piece, caseback design, the entirety of the pressure placed on caseback gets exerted on the case of the watch itself, particularly near the threads. By separating the caseback into two components, Rolex is able to redistribute much of the force being exerted on the rear surface of the watch. The outer, screw-down ring performs the sole duty of keeping the inner, titanium caseback tight on the watch, while the nitrogen-alloyed steel compression ring ultimately supports all the pressure being exerted on the titanium case-back itself.
