Citizen Men's Watch - Citizen Collection Mechanical Open Heart NP1014-77EProduct Highlights A three dimensional design created by combining two separate rings, exuding a sense of depth and weightiness. Features include a subdial with a 60 second hand and other meticulous functions. The open heart design allows you to appreciate the delicate movement of the balance wheel, the heart of a mechanical watch, visible from the 7 o'clock position on the dial. The transparent case back provides a view of the oscillating weight and