Six Groschen of <a href="https://en.wikipedia.org/wiki/John_II_Casimir_Vasa" class="extiw" title="w:John II Casimir Vasa">John II Casimir Vasa</a> with his portrait, Polish Eagle and Lithuanian Vytis (Waykimas), minted in 1661.
<a href="https://en.wikipedia.org/wiki/Polish-Lithuanian_Commonwealth" class="extiw" title="w:Polish-Lithuanian Commonwealth">Polish-Lithuanian Commonwealth</a> (coin), Nacionalinis muziejus Lietuvos Didžiosios Kunigaikštystės valdovų rūmai / Palace of the Grand Dukes of Lithuania (image)
CC BY 4.0
<a rel="nofollow" class="external text" href="https://www.limis.lt/greita-paieska/perziura/-/exhibit/preview/40000005900486">LIMIS</a> (primary account number of exhibit: LDKVR GEK 1347)