Hamilton Khaki Navy Frogman Auto

The Hamilton Khaki Navy Frogman Auto, reference H77485130, has a steel case measuring 41 mm across and 13.09 mm thick. A black dial with central seconds lies beneath sapphire. The case is water resistant to 300 metres and has 20 mm lugs, on a steel bracelet with a folding clasp. A Nivachron balance spring regulates self-winding calibre H-10, which keeps an 80-hour power reserve. The screw-down crown has a bridge-shaped crown guard.