The Bell & Howell 624 8mm cine camera was introduced into Britain in 1955.
The cameras were manufactured in Britain by the Cine and Photographic Division of Rank Precision Industries Ltd under license from the American Bell & Howell Co.. 
They were a popular camera in the 1950s for shooting home movies, featuring a clockwork motor and a 10mm f/1.9 Super Comat lens. 
The camera works really well showing and comes with its original leather case and You can still buy the film to fit this camera.
Measuring, 
Camera 5cm x 15cm x 9cm deep
Case 12cm x 17cm x 7cm deep