The design of the new Hamilton Jazzmaster Open Heart turns timekeeping into something of a tease. A glance at the face of the watch reveals part of the Swiss automatic movement in action — but not all of it. Some things can be left to the imagination — especially when they are clothed in sumptuous quality materials and fine design detail. Caliber 2824-2. Automatic. Sapphire Crystal. Open Case Back. Water Resistance 5 bar (50 m) / 73 psi (164 ft). Silver Dial. Stainless steel. 40MM