Product No. H32576735 Caliber H-21 Collection Jazzmaster Movement Automatic Functions Chronograph, Date display, Day display Case Size 41mm Thickness (mm) 15.1 Dial Color Black Case Material Stainless steel Crystal Sapphire crystal Lug Width 22MM Power Reserve 60 hours Status Discontinued collection Water Resistance 10 bar (100 m) Strap reference H6003261041 Buckle Type Pin buckle Buckle Width 20MM H-21 The H-21 is a powerful automatic chronograph movement with a standard power reserve of 60 hours. The bridges feature Hamilton's initial "H" pattern, making it the perfect caliber for sporty and tough timepieces.