½ Groschen - Casimir IV Jagiellon Contemporary counterfeit

Contemporary counterfeits of Casimir IV's half-groschen are well documented and circulated freely during his reign (1447–1492), exploiting the coin's low intrinsic value and the kingdom's limited capacity to police its monetary supply across Silesia, Prussia, and the Lithuanian borderlands. The billon content of official issues was itself debased enough that forgers needed only modest equipment to produce plausible copies.

Weight typically runs well below official specification — this example at 0.70g is consistent with the lighter flans favored by counterfeiters to maximize output per unit of metal.