A set of four polish half-groschen:
- two half-groschen of Casimir IV Jagiellon (1447-1492), without date [1479-1492], Cracow mint
- two half-groschen of John Albert (1492-1501), wihout date [1492-1498], Cracow mint
The same coat of arms appears on all half-grochens - Róża - which belongs to Piotr of Kurozwęki, who served as the Great Crown Treasurer in the years 1479-1498.
