Certina Certina 17-25

The Certina 17-25 is a manual-winding mechanical movement introduced in 1955. Measuring 7 3/4 lignes (approximately 22mm) in diameter, it operates at 19,800 vibrations per hour with a power reserve of approximately 44 hours and contains 17 jewels. The movement features a small seconds complication and belongs to the Unitas movement family alongside the 630, 631, and 633 calibers. It includes Incabloc shock protection.