Watch Specification
Model: SD1981
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 transparent AR coating.
Water resistance: 200 m / 20 ATM
Luminous: Swiss C3 green and BGW9 blue super luminous.
Crown: Screwdown Crown
Case back: Screwback Case
Watch Dimension
Case diameter: 43.8mm ( without crown)
Case length: 46.8mm (lug to lug)
Case thickness: 13.5mm 
Lug width: 20mm 
Our service
Warranty: 2 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.