An unusual player for a forgotten 70s music format

This was mistakenly advertised as a Karaoke machine. It isnt a Karaoke machine. Nevertheless I took a punt on buying it as I had the feeling that I owned the unusual cartridges it plays. In this video you can see if my hunch paid off and learn more about a rare format through an even rarer player. My earlier video about this format UPDATES: I) The machine appears to date from approx 1976. A helpful person on Patron spotted a date code on the speaker. II) Crown Werent they a brand (delete as applicable) not this Crown 00:00 Start 00:40 The machine 02:16 HiPac 07:37 What did it do 10:31 How did it work 12:48 The 50, 60Hz issue 15:44 A look inside 22:20 Cart player mech 26:22 Blather 28:20 A load of carts 30:10 Inside a cart 31:51 Internal speaker 32:45 Blank carts recording 37:03 Summary 38:43 Patreon credits SUBSCRIBE