Features: 316L Stainless Steel Case Green Canvas Strap Quartz Movement Caliber: Seiko VX42 Sapphire Crystal With Anti-Reflective Coating Khaki Green Dial Stainless Steel Crown Analog Display Luminous Hands Date Window At 3 O'clock Solid Stainless Steel Case Back Engraved Case Back With Lewis And Clark Expedition Image Buckle Clasp 100m Water Resistance Approximate Case Diameter: 40.00 mm (Without Crown) Approximate Case Diameter: 43.40 mm (With Crown) Approximate Case Thickness: 09.10 mm Approximate Lug Width: 20.00 mm