Brand: San Martin Model: SN0066-G Movement: YN55A [Automatic mechanical movement] Case: Material - 316L Solid Stainless Steel Case 42mm in diameter Lug to Lug 46.5mm Thickness 12.4mm Band width 20mm Glass: Sapphire Crystal Glass, AR Coating Bezel/Chapter Ring: Internal Bidirectional Turn Dive Bezel/Chapter Ring, Button Control Dial Color: Enamel Black, Applied indices, 6 O 'clock Position Date Windows Hands: Arrow Hands, Luminous Luminous: BGW-9 Blue Light, Hands and Markers Crown: Screw-down Crown, With 3D Hexagonal Logo Case Back: Screw-down Case Back Strap: 316L Solid Stainless Steel Bracelet, Size 20mm *18mm Clasp: New Fly Adjustable Clasp, With 3D Hexagon Logo Water Resistant: 20Bar=200 meters Weight: about 172g Warranty: 2 Year