I don't want to get too way out but by advertising, maybe it was a chip given to certain people. The presentation of the chip would allow the bearer ??????? (something)

Maybe the story will change when I talk to the seller tomorrow (although the seller will then have to call her mother). I'll try to get as many details as I can.

BTW, did you know that USPC did issue c&s with black and white photos inlaid. A Butte, MT chip with a picture of a Mr. George Hagenson comes to mind.