"This is small reel-to-reel tape my dad got from a radio station. He would get lots of tapes from radio stations and give them to me, then I would record over some of them, cut them up for tape-loops or whatever, but most of the time would leave the spots as-is. This is marked 'Marco' and 'demo,' most likely an astrologer sent this to radio stations for a series of these short 2-minute spots.  This one is for December 25, 1972 - January 5, 1973."

Via Tim Stamps