I am recommissioning a CVA 79 Milling milling machine, having made a new spindle pulley I am looking for a picture or details of the spindle lock that I believe attaches to bracket on the top left. Unfortunately most pictures on the internet don't have it or are from below, presumably it clamps around the pulley like a disc brake calliper. I would be grateful if someone could share a picture or describe it so I can reproduce one please.