BS 5550-2.11.1:1978 Cinematography. 16 mm film. Spindles. Specification for dimensions of spindles for 16 mm motion-picture camera and projector spools
This International Standard specifies the dimensions and characteristics of 16 mm camera and projector reel spindles.
BS 5550-2.11.1:1978 history
1978BS 5550-2.11.1:1978 Cinematography. 16 mm film. Spindles. Specification for dimensions of spindles for 16 mm motion-picture camera and projector spools