I have just been given a "Biddle Versapot", model 72-311. My question is, wtf is/does this thing do? It's panel says "calibrator/potentiometer". I haven't had any luck with searching the net, so I thought I'd ask here. Thanks.
James G. Biddle Co. Plymouth Meeting, PA cat. # 72-311 ser. # 78538
I opened it up to see it's clean, and has lots of batts. Don't want to replace the batts without more info. It looks like it could be useful, if I knew what its application was... Thanks again.