This is the Steeldive SD1964 which is a homage to the Sea-Dweller which was developed in late 1967 to counteract the problems caused by decompression when Helium atoms inside a pressure chamber can work their way inside a watch. During decompression, the pressure inside the chamber can decrease more rapidly than the pressure inside the watch case. This can, in some cases, cause the watch crystal to pop off. The helium-release valve allows helium to escape from the case during decompression preventing damage to the watch.Although resembling the Submariner, it is a bigger watch and has more presence on the wrist.
Movement: Japan NH35 automatic, 41 hours of energy storage.
Case material: 316L stainless steel
Case back: 316L stainless steel
Bezel:120 Click unidirect rotational ceramic bezel
Watch mirror: sapphire crystal with AR coating.
Water resistance: 1000 m / 100 ATM
Luminous: Swiss C3 green and BGW9 blue super luminous night light.
Case back: Screwback Case
Exhause value: Yes
Case diameter: 45.5mm(without crown)
Case length: 54.83mm(lug to lug)
Case thickness: 17.1mm
Lug width: 22mm
Warranty: 3 years
Returns policy: Please check the website“Return / Exchange / Warranty Policy”
Style: automatic watch, dive watch, luxury watch
Package: watch, box, warranty card, user manual
Service: Support retail, wholesale. OEM/ODM. Please contact the seller if necessary.