Hamilton Jazzmaster Open Heart Auto

The Hamilton Jazzmaster Open Heart Auto, reference H32215170, has a steel case measuring 36 mm across, with water resistance to 50 metres. At 10 mm thick, the case spans 42 mm from lug to lug and has a see-through back, on a steel bracelet with 18 mm lugs and a butterfly clasp. A precise cut-out breaks the pink dial beneath a sapphire crystal. The self-winding H-10 calibre keeps an 80-hour power reserve and uses a Nivachron balance spring.