SAN MARTIN - Bronze Automatic - 40.5 mm - Sapphire - Blue Dial Extraordinary bronze watch from the renowned watchmaking firm San Martin. The patina (which appears naturally over time due to the corrosion of the material) gives the watch an appearance that is unique to each piece. The set includes a polishing stick to polish the bronze to your liking. Movement: NH35A [Automatic Mechanical Movement] Case: Material-CuSn8 tin bronze Diameter: 40.5mm (without crown) Length: 48mm (including lugs) Thickness: 13mm (including mirror) Lug Width: 20mm (Inside) Crystal: sapphire crystal, Cyclops at date window position Bezel: Bronze bezel, luminous indication at 12 o’clock Dial: Blue Hands: Bronze hands, filled with luminous Luminous: Retro BGW-9 Super Luminous (Glow Color: Blue) Crown: screw-in diameter 7mm Caseback: Screw-in Caseback Strap: first layer cowhide, hand-turned fur strap, width 20*18mm Buckle: CuSn8 tin bronze pin buckle Waterproof: 200 meters waterproof Warranty: Two-year warranty