Longcase 4" (100mm) Brass Faced Lead Bob. A high quality Pendulum Bob for good quality Longcase eight day & thirty hour movements.
The bob is manufactured from a one piece lead casting. This is cast directly on to the polished brass face with a totally enclosed slot for the Pendulum flat, running through the centre of the Bob.
Dia 4" (100mm)
Weight 2.75lb (1.278kg) approx
Slot 3/8" x 3/16" (9.50 x 4.75)