Mechanical | 38mm | H69439931 Watch Reference : H69439931 Caliber : H-50 Collection : Khaki Field Movement : Mechanical Case size : 38mm Dial color : Black Case material : Stainless steel Crystal : Sapphire Lug width : 20mm Power reserve : 80-hour power reserve Water Resistance : 5 bar (50m)/73 psi (164ft) Bracelet/Strap Strap reference : H6006941021 Strap type : Nato Buckle type : Pin buckle Buckle width : 20mm Top Denotation : Leather Top Species : Cow Top Tanning : Mineral The H-50 is an exclusive caliber specifically developed for our handwinding watches. The H-50 is available with or without a date function and has an extended power reserve of up to 80 hours, ensuring maximum reliability even when it is not wound for a few days.