Hamilton Khaki Field Mechanical Power Reserve 40mm

The Hamilton Khaki Field Mechanical Power Reserve 40mm, reference H69509930, has a 40 mm steel case with water resistance to 100 metres. Case dimensions extend to 11.95 mm in thickness and 48 mm from lug to lug, with a pin-buckle textile strap at the 20 mm lugs. The black dial beneath sapphire displays central seconds and a power reserve indicator marked F for full and E for empty. A Nivachron balance spring regulates hand-wound calibre H-23, which holds an 80-hour reserve.