Seiko SPB121J1

Seiko PROSPEX Alpinist - Green Dial PROSPEX Movement Caliber Number:6R35 Movement Type:Automatic with manual winding capacity Accuracy:+25 to -15 seconds per day Exterior Case Material:Stainless steel Crystal:Sapphire with magnifier Crystal Coating:Anti-reflective coating on inner surface LumiBrite:Lumibrite on hands and indexs Band Material:Calfskin Clasp:Three-fold clasp with push button release Other Details Water Resistance:200 bar Case Size Thickness: 13.2 Diameter: 39.5 Length: 46.4 Other Specifications Rotating compass inner ring Screw case back Screw-down crown See-through case back Other Features 24 jewels Date display Stop second hand function