The BM13-1975A is a variant of the Baumatic movement based on the BM12 architecture. The most notable difference from the BM12-1975A is the absence of the TwinSpir balance spring (made of two layers of silicon) due to patent issues. It retains the 5-day power reserve and silicon escapement components. Available in both standard and COSC-certified versions.
Movement Type
Automatic
Jewel Count
21 jewels
Power Reserve
120h
Frequency
28,800 vph (8 Hz)
Diameter
28.2mm
Height
4.2mm
Display Type
Analog
Rotor Type
bidirectional
Winding
ball bearing
Shock Protection
Incabloc
BRAND
Baume & MercierTYPE
AutomaticSTATUS
In ProductionMANUFACTURE
In-houseLAUNCH YEAR
2020CALIBER FAMILY
BaumaticCOUNTRY
SwitzerlandALSO KNOWN AS
