Szeląg koronny - Stanisław August Poniatowski Kraków mint

Poniatowski's copper szeląg was among the first coins reformed under the monetary overhaul initiated at the very start of his reign in 1764, when the Grodno and Warsaw sejms moved to rationalize a coinage system that had been debased into near-uselessness by decades of foreign imitation and private mint fraud. The Kraków facility — operating under crown authority rather than the magnate-controlled provincial mints — was central to pushing standardized copper into circulation across the Commonwealth's fractured monetary territory.

Kop. 2157 and 2158 represent distinct die varieties within this run, a distinction Kopicki documented carefully given how chaotic production recordkeeping was at Kraków during the mid-1760s.