Seiko 9F61

Caliber 9F61 is a slim quartz movement manufactured by Seiko. It offers ±10 seconds per year accuracy and uses Seiko's Twin Pulse Control Motor for efficient power delivery. The movement has no date complication and provides approximately three years of battery life. Introduced in 1993, it was the first caliber in Seiko's 9F family of high-accuracy quartz movements and remains in production.