I was digging through a bunch of Model A stuff I bought a while back and found this in a bucket of brackets and screws. Anybody know what this was used for? I have no idea but it's cool so I'll keep it in case I ever need a clamp like this. It says "5 minute vulcanizer" on one side and "Stalher" on the other and on both sides of the thumbscrew. Vulcanization is a process used to make rubber that involves heat and pressure but I have no idea what or how you could vulcanize with a clamp.