A very rare variety of the 1830 penny, with the initials of Karl Gronau, instead of the popular F.H. (Hunger).
This is well illustrated by Berezowski, who gave the penny with FH as 0.20 zlotys, and with KG as low as 2.50 zlotys.
This is similarly evident in the Onebid archive, where for every one coin from KG, there are more than 20 from FH.
