OK one more question. There are threads on the inside of the shutter button. Is that for a "remote" or timed release? I have not seen any examples of them but it make sense to me I guess.
I have two of these cameras one of which works and one is missing the shutter knob. A site like this can be a great help in keeping it up and running. http://www.arguscg.org/manuals/c3/gaon-repair/