Brass pendulum bob
On command
Ø 115 mm
Ø 160 mm
Ø 225 mm
Ø 278 mm

Lens only. Domed, polished brass, blackened plastic back.

It is important that the mechanism is perfectly stable and plumb in the body.
When the center of gravity of the clock balance is raised, the movement accelerates imperceptibly, which helps to keep ahead.
A center of gravity of the pendulum of the Paris pendulum and the Comtoise clock that one descends imperceptibly slows it down, which contributes to delay.
Extend or shorten the balance using the nut provided for this purpose, located at the bottom of the balance