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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.

First of all, the case size is 40.9*12.3mm which is almost as the same the per original, not only because it is made out from a 1:1 case but also because the team conquer so many difficulties to develop a replica A79350 movement. Some editions are not able to do the same size case as original edition is because it is limited by the movement inside of it, some factories are not able to copy the original movement. Then let’s move to the dial, the craftsmanship and fine details are just the same as original. IWC’s logo is very clear, and the character size is the same as original, there is no difference by looking at it. The outside markers for chronograph second function is also copied greatly. The blue long needle is for showing chronograph second, and sub-dial at 12:00 position shows chronograph minute. Sub-dial at 6:00 position together with two hands in the middle to show the time. Time Markers are numeral. Look into carefully, even the axis to hold those three hands are done as well as per original, perfectly in details! Both V6 edition and original’s front glass are made of sapphire crystal, this is a easy job for ZF to follow. Look at the case side, no matter the polish or matt work, they are exactly the same as the genuine. On the crown and the buttons for adjust functions, they are looking the same in shape and engraving logo on it, but V6 edition’s is painted with blue coating which is for protecting them from the scratch. For the strap, the original one is using crocodile leather, V6 edition’s standard strap is real cow leather but Z factory also offer crocodile leather with extra pay.

Several years ago, Panerai published Luminor Submersible 1950 PAM 382, which raised a bronze storm in watch industry. The story between XF and bronze started from Panerai’s PAM 382. Afterwards, XF unveiled PAM 507, PAM 671, Zenith Type 20 Pilot Extra Special, Tudor Black Bay Bronzo, these are all art work of XF that are made of bronze material. So, we can see that XF factory continuously researched bronze and applied this material in their watch-making process, today, they released this IWC Pilot Spitfire bronze watch, it is the first IWC watch that is made of bronze.Actually, it is not hard to make a bronze case, but the difficulty is that bronze case should be oxidized to our expected result at the speed we want, XF has always been researching this, now the oxidized result on this IWC Pilot Spitfire has achieved a perfect condition, which is closest to genuine, compared with the bronze case from small factories, you will find that their oxidized color is uneven and there is even rusty spot.