Automatic | 40mm | H64455523 Military time features prominently on the dial of the Khaki Field King Auto, underlining the military heritage of this handsome Hamilton. Specially designed protectors ensure the safety of the crown at all times. Long live the king. Watch Reference : H64455523 Caliber : H-40 Collection : Khaki Field Movement : Automatic Case size : 40mm Dial color : Beige Case material : Stainless steel Crystal : Sapphire Lug width : 20mm Lining Tanning : Mineral Power reserve : 80-hour power reserve Water Resistance : 5 bar (50m)/73 psi (164ft) Open Case Back : Yes Bracelet/Strap Strap reference : H6007041041 Strap type : Cow leather Buckle type : Pin buckle Buckle width : 18mm Top Denotation : Leather Top Species : Cow Top Tanning : Mineral Lining Species : Cow With an extended power reserve of up to 80 hours, the H-40 is both beautiful and bold. Almost double than market standard, 80 hours power reserve means you can remove your watch on Friday and it will still be ticking on Monday.