these came from a photo-electric cell.not sure what volts or amps as it seems to have multiple connections i wouldn't know where to start testing to see if they work.the gold seems to be really thick and ive read the photo sensitive material might be silver based.
they are,good eye.this was very rich in PM's pound for pound.this is the material i cut my teeth on (so to speak).i still have 500-700 pounds of boards left and have cut fingers from about half so far.