Seiko Prospex Marinemaster 1968 Heritage Diver Black HBF001 Enhancer The hand-wound Caliber 9R31 delivers

The hand-wound Caliber 9R31 delivers a 72-hour power reserve thanks to its Dual Spring Barrel mechanism in which two springs are set in parallel within one single barrel

Material: 18K Rose Gold

Strap:Material: Genuine Crocodile LeatherColor: Navy BlueType: StrapClasp: BuckleLug Width: 20 mm

Black Leather strap with stainless steel pin buckle

Seiko Prospex Marinemaster 1968 Heritage Diver Black HBF001 Enhancer The hand-wound Caliber 9R31 deliversFeatures: Hour, minute, seconds Date Display Unidirectional rotating bezel Screw down crown Screw case back Stop second hand function Specifications: Movement: Seiko Automatic Manual Winding Caliber 8L45 Precision: +10 to 5 seconds per day Power Reserve: Approx. 72 hours (3 days) Frequency: 28,800 VpH Jewels: 26 jewels Water Resistance: 200m 660ft diver's Case: Material: Stainless steel Diameter: 39. 5mm Thickness: 12. 3mm Crystal: Box shaped sapphire