So a friends Grandfather has a 1935 Bally Prospector (http://www.ipdb.org/machine.cgi?id=1872), that is non-working.
I have been asked to come take a look and see if I can't get it up and running.
Any suggestions on what I should look up, or know about before hand on these Pre-WWII machines? I have completely gone through and fixed my 1977 Williams Argosy, so I think I will be able to do the follow the wire and what not. But having no schematics makes me a bit worried.
Also any idea what a machine of this era/type is worth? I can guarantee I will be asked that question.