Left: 1912 Canadian $5 gold coin, PCGS MS63.
Right: 1912 Canadian $10 gold coin, PCGS MS61.

Top: Bolivia 10,000 pesos (Pesos Bolivianos) banknote.
Bottom: Japan 10 yen banknote, 1946-1951 era.

Missouri cardboard one-mill sales tax receipt, counterstamped on reverse to honor Jerry Bates.
Rick Schulz reports that this piece is the size of a milk bottle cap.