The next part of this camera's work is now in motion.
I had mentioned in the DP-1 thread that the galvanometer was dead. I still don't know exactly how I revived it. It does work but it is a little jumpy. Many times I need to hit the battery test button first to get it moving or to keep it from oscillating. After that it seems to respond fine.
I'm pretty shure the resistor ring is OK. It is the later model and resistance testing with a VOM shows no jumpy behavior. It responds perfectly.
I have two inexpensive DP-1 on the way. One dead that looks mint and one that supposedly works but looks bad. Between those two, and the one I already have I should be able to make one good unit.