Watch Specification
Model: SD1957
Movement: Japan NH35 automatic movement
Case material:316L stainless steel
Case back: 316L stainless steel
Bezel: Unidirectional Rotational ceramic bezel  
Watch mirror: sapphire crystal with AR coating.
Water resistance: 300 m / 30 ATM
Luminous: Swiss C3 super luminous, Green light 
Crown: Screw-Down
Case back: Screwback Case back
Watch Dimension
Case diameter: 42.5mm(without crown)
Case length: 49.5mm(lug to lug)
Case thickness: 15.75mm 
Lug width: 20mm