Battery Replacement: A new battery in the Seiko caliber 7A28A should last approximately 2 years. If you need to change the battery, it is possible to DIY. The battery number is 394 (SR936SW). This movement features a low battery indicator (EOL) which will make the seconds hand jump ever...
Battery Replacement: A new battery in the Seiko caliber 7A28A should last approximately 2 years. If you need to change the battery, it is possible to DIY. The battery number is 394 (SR936SW). This movement features a low battery indicator (EOL) which will make the seconds hand jump ever...