The Certina 25-681 is considered the world's smallest automatic chronograph movement since its introduction in 1988. Initially developed exclusively for Blancpain, it is now utilized by various high-grade watch brands. This meticulously crafted movement boasts a ball-bearing rotor and incorporates the Triovis micrometer regulator for precision timekeeping. It features an impressive array of functions, including a pillar wheel for a 60-second, 30-minute, and 12-hour chronograph, as well as a sub-second display and quickset date functionality. Furthermore, the Certina 25-681 is an automatic mechanical movement, upholding the revered tradition of watchmaking.