Possibly related are silver coins called "trade dollars" that were minted in the usa and used for trade with china which exibit "chop marks" signifying validity

Possibly related are silver coins called "trade dollars" that were minted in the usa and used for trade with china which exibit "chop marks" signifying validity: https://www.google.com/search?sca_esv=9cb25f21911ea42e&q=trade+dollars+with+chop+marks&udm=2 https://www.google.com/search?sca_esv=9cb25f21911ea42e&q=tra...