Those a very cool looking. You have listed as 20 sets made. I can tell you there are not 20 complete sets out there. Some sets being in your lucky hands. I picked up the below token in a junk box at a coin store some time ago. So maybe only 19 complete sets out there as someone broke their set up and I got one of the tokens. Maybe makes yours even that tiny bit harder to ever own a complete set.

Nice.