Excellent art. Appreciated with the highest rating of the NGC (MS68
A hard-to-get technological attempt at the first twenty-dollar coin with Marceli Nowotko.
Minted in cupro-nickel in an edition of only 20 pieces.
Variety with the inscription SAMPLE offset from the neck.
Made with a different obverse stamp than the nickel issue (smaller eagle), as shown in Janusz Parchimowicz's "Polish Sample Coins 1949-1990" catalog.