Hamilton Khaki Aviation Converter Auto Chrono

The Hamilton Khaki Aviation Converter Auto Chrono, reference H76726130, is a chronograph in a 44 mm steel case water resistant to 100 metres. Its black dial carries day and date displays beneath sapphire crystal, alongside a tachymeter scale. At 14.6 mm thick, the case has a screw-down crown, a see-through back and 22 mm lugs for a steel bracelet with a folding clasp. Self-winding calibre H-21-Si holds a 60-hour power reserve. A bi-directional rotating slide-rule bezel calculates unit and currency conversions.