I’ll keep an eye out for a copy, I have a soft spot for expo exonumia. I dig that medal, cover model coinage!
Sorry to burst your bubble but I’m afraid you’ve misunderstood the excerpt from the book. There were two “styles” with the initials, not two...
Nothing special. They sell those in vending machines. https://www.cointalk.com/threads/cool-coin-machine-must-see.413046/
Zacatecas
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