½ Groat - Sigismund II Augustus Contemporary forgery

Contemporary forgeries of Sigismund II Augustus billon half-groats circulated widely during the mid-sixteenth century, exploiting the chronic small-change shortage that plagued the Polish-Lithuanian Commonwealth's retail economy. The official issues themselves varied considerably in silver content across mints at Vilnius, Kraków, and Gdańsk, which made debased imitations difficult for ordinary users to detect and easier for forgers to pass without suspicion.

The reduced weight against official specification is the primary diagnostic here — surviving forgeries of this type typically show improvised die work and uneven flan preparation consistent with clandestine striking rather than file adjustment after the fact.