Geeks will help out in the comments, but it appears what we have here is a QSL card — a postcard mailed to confirm receipt of a ham or citizens-band radio transmission. The CM 76 presumably means it was a calling card of Duluth ham radio operator Charles F. Makowski circa 1976.
I think (from the numbered frequency channels and the absence of an alphanumeric call sign) this is a CB QSL card; though it looks like the same person used both CB and ham radio.
2 Comments
mlatsch
about 3 years agoPaul Lundgren
about 3 years ago