Quartz watch with high precision. The quartz watch mechanism based on the piezoelectric phenomenon, and is one of the most energy-efficient, and has a reliability of less than 1 sec. over a 6 year period. An ideal watch for the individual or collective office. The watch has a large display, which makes it easy to read from a distance of up to 25 meters. Diameter 30.5 cm. Glass front. Battery AA – "Not included".