Seiko Presage 60's Style Stainless Steel 40.8 MM Automatic Watch SSA423J1 Grand Seiko The screw-in force of the

The screw-in force of the screw lock bezel on an internal gasket further increases mud resistance

across the dial

Caliber Number: 8A50

Caliber Number: 5R66

Seiko Presage 60's Style Stainless Steel 40.8 MM Automatic Watch SSA423J1 Grand Seiko The screw-in force of theCaliber Number: 4R39 Movement Type: Automatic with manual winding Power reserve: Approx. 41 hours Jewels: 24 24 hour hand Stop seconds hand function Case Material: Stainless steel Case Size Thickness: 12. 8mm Diameter: 40. 8mm Lug to lug: 47. 0mm Crystal: Box shaped Hardlex LumiBrite: LumiBrite on hands and index(es) Clasp: Three fold clasp with push button release Bracelet Length: 200. 0 Distance between lugs: 20 Water Resistance: 5 bar Weight: 140.