Hamilton Jazzmaster Open Heart Auto

The Hamilton Jazzmaster Open Heart Auto, reference H32675140, has a steel case measuring 40 mm across, water resistant to 50 metres. A blue smoked dial carries central seconds under sapphire, with cutouts revealing the movement. Calibre H-10 is self-winding with a Nivachron balance spring and an 80-hour power reserve. At 11.05 mm thick, the case has a see-through back and sits on a steel bracelet with 20 mm lugs and a folding clasp.