Hamilton Khaki Field Power Reserve 40mm

The Hamilton Khaki Field Power Reserve 40mm, reference H69509140, has a 40 mm steel case water resistant to 100 metres. A blue dial beneath sapphire shows central seconds alongside a power reserve indicator. The case measures 12 mm thick and 48 mm from lug to lug, with a steel bracelet, folding clasp and 20 mm lugs. An 80-hour reserve and a Nivachron balance spring distinguish hand-wound calibre H-23.