Seiko 5 Sports SRPJ81 Field Sports Style Black Dial Automatic 36mm Zodiac Case Diameter: 38

Case Diameter: 38

Each of the hour markers has a generous coating of Lumibrite

The mechaquartz movements were invented after the Quartz crisis in the late 80's by swiss and japanese brands quite at the same time

Size/Diameter: 44 mm

Crystal: Hardlex

Seiko 5 Sports SRPJ81 Field Sports Style Black Dial Automatic 36mm Zodiac Case Diameter: 38Calibre Number 4R36 Movement Type Automatic with manual winding Power reserve Approx. 41 hours Jewels 24 Functions Stop seconds hand function Day Date display Case Band Case Material Stainless steel Case Size Thickness: 12. 5mm Diameter: 36. 4mm Lug to lug: 44. 4mm Crystal Curved Hardlex LumiBrite LumiBrite on hands and index(es) Clasp Three fold clasp with push button release Distance between lugs 18 Other Details Water Resistance 10 bar Weight 114.