Seiko Prospex Sea Automatic With Manual Winding 42.6mm Watch 1968 Heritage Diver's Edition

Caliber Number:8L35
Movement Type:Automatic with manual winding
Precision:+15 to -10 seconds per day
Power reserve:Approx. 50 hours
Jewels:26
Case Material
Stainless steel
Case Thickness:13.1mm
Case Diameter:42.6mm
Lug-to-lug:49.3mm
Crystal:Dual-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

Functions:
28,800 vibrations per hour (8 beats per second)
Stop second hand function
Date display

Water Resistance:200m / 660ft diver's
Features:
Unidirectional rotating bezel
Screw-down crown
Three-fold clasp with secure lock
Screw case back