A chuck often found fitted to the CAV was the "Whiton" 3 jaw ring-scroll chuck of 2.5" diameter.
The maker's name was inscribed on the face of the chuck, with the CAV logo and company address on the outside.

Six-screw Bell Chuck
Internal diameter 11/2"

Eight Screw Aluminium Ring Chuck
Internal diameter 111/16"

Tiny,  radially-slotted faceplate which could be converted in a 4-jaw chuck by the addition of four faceplate clamps as shown below.

Faceplate clamp
Designed to fit into the faceplate slots and convert it into a simple 4-jaw chuck. Supplied in sets of four.

Bench Countershaft Unit