Watch Specification
Model: SD1989
Movement: Japan NH35 automatic, 41 hours of energy storage. 
Case material: 316L stainless steel
Case back: 316L stainless steel caseback.
Bezel: 120 clicks unidirect rotational ceramic bezel
Watch mirror: sapphire crystal with AR coating.
Water resistance: 1000m / 100 ATM
Luminous: Swiss BGW9 blue super luminous.
Crown: Screwdown Crown
Case back: Monoblock Case
Watch Dimension
Case diameter: 45mm ( without crown)
Case length: 54.5mm (lug to lug)
Case thickness: 15mm 
Lug width: 22mm 
Dial size: 31.5mm
Weight: about 220g including mesh band
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