Hamilton Jazzmaster Open Heart Auto

The Hamilton Jazzmaster Open Heart Auto, reference H32215140, has a 36 mm steel case water resistant to 50 metres. Self-winding calibre H-10 maintains an 80-hour power reserve. The 10 mm-thick case spans 42 mm from lug to lug, with a see-through back, on a steel bracelet with 18 mm lugs and a butterfly clasp. Beneath a sapphire crystal, the blue dial's cut-out reveals the mechanism in motion.