Baume & Mercier Caliber BM12800

Baume & Mercier Caliber BM 12800

Brand	Baume & Mercier
Caliber Number	BM 12800, BM12800
In-House?	No
Base Caliber	Buren 1280
Movement Type	Automatic, self-winding mechanical
Lignes	12.5”’
Diameter	28.1mm
Height	2.85mm
Jewels	30
Beat Rate	19,800 vph
Lift Angle	48 degrees
Power Reserve	54 hours
Rotor Style	Micro rotor
Hand-Windable?	Yes
Anti-Shock Device	Incabloc
Hand Count	2
Hand Sizes	1.4mm / 0.8mm
Functions	Central hours; central minutes
Features	Indirect drive minutes
Country of Manufacture	Switzerland, Swiss made
Known Models	Vintage Baume & Mercier Baumatic (Add your watch to the comments below…)

The Baume et Mercier caliber BM 12800 is a vintage micro-rotor watch movement found in Baumatic watch from circa 1960s. The base movement is actually a Buren calibre with Baume & Mercier branding.

Additional Resources:

More Baume & Mercier watch movements

Note: This caliber listing is still being updated, but feel free to start discussions on it in the comments below…

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