Overview
Steeldive 1975 is an homage to “perfect professional divers' watch” in 1975. One of its innovative features is the ceramic protective shroud that makes the watch extremely robust and also very distinctive. Aficionados thought it looked like the wearer had a can of tuna strapped to his wrist, hence the nickname, “Tuna”.
Watch Specification
Model: SD1975
Movement: Japan NH35 automatic, 41 hours of energy storage. 
Case material: 316L stainless steel
Case back: 316L stainless steel
Dial: Black, sunburst blue, sunburst green
Bezel: 120 clicks unidirect rotational ceramic bezel
Watch mirror: sapphire crystal with AR coating.
Water resistance: 300m / 30 ATM
Luminous: Swiss C3 green and BGW9 blue super luminous.
Crown: Screwdown Crown
Case back: Screwback Case
Watch Dimension
Case diameter: 47.5mm ( without crown)
Case length: 44mm (lug to lug)
Case thickness: 15mm 
Lug width: 22mm 
Our service
Warranty: 2 years 
Delivery: DHL 
Returns policy: 30-day return and refund.
Style: automatic watch, dive watch, luxury watch 
Package: watch, box, warranty card, user manual