The design of the 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.

A three hand movement with or without a date function and boasting a superior Power Reserve of 80 hours. The H-10 appears with intricate contrasting snail and pearled patterns.

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