Watch Specification:
Model: SN0139
Movement: Japan NH35 automatic mechanical movement] 
Glass: Sapphire Crystal Glass, AR Coating
Bezel: 120 Clicks Chronograph Bezel, Ceramic Top Ring, 12 o'clock Luminous Markers
Dial Color: Black
Hands:GS Crafts Hands , Luminous Coating
Luminous: SLN C3 Green Light, Hands and Markers for vintage black dial. BGW9 blue lume for blue and black dial.
Crown: Screw-down Crown,With San Martin Hexagon Logo
Case Back: Screw-down Case Back, Sunburst Brushed Process
Strap: 316L Solid Stainless Steel Bracelet, Width 20 mm*18mm; FKM Rubber Strap
Clasp:316L Stainless Steel Folding Clasp With Safety, With Fine-tuning Function/ 316L Stainless Steel Buckle
Water Resistant:20Bar=200 Meters
Watch Dimension:
Case diameter: 39mm( without crown)
Case length: 47.7mm( lug to lug )
Case thickness: 13mm (including mirror)
Band Length: Bracelet:180mm/7.1in; Strap:195mm/7.7in
Band width: 20mm*18mm
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.