Baume & Mercier BM12800

The BM12800 is a vintage micro-rotor automatic movement from the 1960s Baumatic collection. Based on the renowned Buren 1280 caliber, it features an ultra-thin profile (2.85mm) achieved through its integrated micro-rotor design with indirect drive minutes. The 30-jewel movement beats at 19,800 vph (2.75 Hz) and offers 54 hours of power reserve. The lift angle is 48 degrees. This elegant movement represents the original Baumatic line before Baume & Mercier developed their modern in-house Baumatic calibers.