Seiko Y301

The Seiko Y301 is a discontinued quartz movement manufactured in Japan. It measures 20.0 mm in diameter and 1.6 mm in height, uses a SR716SW battery, and contains 3 jewels. As a time-only caliber, it achieves ±2 seconds per month (±10 seconds per year), placing it in Seiko's high-accuracy quartz category—double the precision of the related Y302 caliber, which adds a date complication. The movement was produced for Pulsar-branded watches and is alternatively referred to as Y301A.