Hamilton Jazzmaster Open Heart Auto

The Hamilton Jazzmaster Open Heart Auto, reference H32705142, has a 42 mm steel case water resistant to 50 metres. A cut-out in the blue dial exposes the movement, with central seconds beneath sapphire. The 11.44 mm-thick case measures 50 mm from lug to lug and has a see-through back, with a steel bracelet and folding clasp at its 22 mm lugs. Calibre H-10 winds automatically and holds an 80-hour power reserve.