Hamilton Khaki Aviation Converter Auto Chrono

The Hamilton Khaki Aviation Converter Auto Chrono, reference H76746140, is a 44 mm steel chronograph water resistant to 100 metres. A bi-directional rotating slide-rule bezel surrounds the blue dial, whose day and date displays sit under sapphire crystal beside a tachymeter scale. The 14.6 mm-thick case has a screw-down crown and a see-through back, on a steel bracelet with 22 mm lugs and a folding clasp. A silicon balance spring and a 60-hour power reserve equip self-winding calibre H-21-Si.