Seiko Prospex Sea Stainless Steel Automatic With Manual Winding 40mm SPB451

Case Material; Stainless steel
Case Size: Thickness:13.0mm Diameter:40.0mm Lug-to-lug:46.4mm
Crystal; Curved sapphire crystal
Crystal Coating: Anti-reflective coating on inner surface
LumiBrite: LumiBrite on hands, index(es) and bezel
Clasp; Three-fold clasp with secure lock , push button release with extender
Distance between lugs: 20
Caliber Number: 6R55
Movement Type: Automatic with manual winding
Precision: 25 to -15 seconds per day
Power reserve: Approx. 72 hours(3 days)
Jewels: 24: Functions, Stop second hand function