Hamilton Jazzmaster Open Heart Auto

The Hamilton Jazzmaster Open Heart Auto, reference H32215142, has a 36 mm steel case with water resistance to 50 metres. The blue aventurine dial lies beneath a sapphire crystal. The case is 10 mm thick and 42 mm from lug to lug, with a see-through back, on a steel bracelet with 18 mm lugs and a butterfly clasp. Self-winding calibre H-10 regulates with a Nivachron balance spring and maintains an 80-hour power reserve.