Hamilton Jazzmaster Open Heart Auto

The Hamilton Jazzmaster Open Heart Auto, reference H32215100, has a 36 mm steel case water resistant to 50 metres. Sunray finishing surrounds the dial's cut-out beneath a sapphire crystal, revealing the mechanism. A see-through back closes the 10 mm-thick case, which measures 42 mm from lug to lug and sits on a steel bracelet with 18 mm lugs and a butterfly clasp. Self-winding calibre H-10 keeps an 80-hour power reserve with a Nivachron balance spring.