Crystal Motor for Bolex 4, 5, SB, SBM
Includes Power supply, and charger
A must for music videos and sync sound

FPS Speeds 12, 15, 24, 30, 48

From the manual:
This motor will only fit H16 and H8 cameras that have the added 1:1 drive shaft, beginning with S/N about 210,601 of 1965 and up, including the models Rex-4, Rex-5, SB, SBM, M4, M5, and S4