Seiko Prospex Speedtimer Watch SSC817P1. Solar movement. Movement Caliber Number V192 Movement Type Solar Accuracy ±15 seconds per month Case Material Stainless steel Curved sapphire crystal Anti-reflective coating on inner surface Lumibrite on hands and index(es) Three-fold clasp with push button release Water Resistance 10 bar Case Size Thickness 13.3mm Diameter 39mm Length 45.5mm Weight 161.0g