Object Description
One of the earliest of the Type A Bulle clocks, serial number 3919, dated around 1920. This one bears the trademark MFB (for Maurice Favre-Bulle who developed it). The fact that the whole of the movement is visible in this model makes it one of the more popular designs.
The 5ΒΌ inch silvered dial has a skeletonised centre, with black steel hands.
The pendulum consists of a coil which passes over the curved bar magnet with three poles (North at either end and South in the centre, or vice cersa). As an electrical current is briefly imparted to the coil, it is attracted towards one end of the bar. It then naturally falls back to (and over-runs) the centre, when the impulse is again imparted to attract it to the other end. This design was patented in 1920, and during the period 1920 to 1952 it is estimated that production was in the region of 300,000 clocks.
The mechanism has been fully overhauled, and runs off two AA batteries, concealed within the vertical brass tube.
Height 16 inches (41cms) to the top of the glass dome.
Diameter of the base :21cms