GERMAN STATES. Ostfriesland. Edzard II, Christoph and Johann von Rietberg. 1540-1566. AR thaler. 42 mm. 1564. A crowned harpy (human face on a raptor body); MO EDZ CR IO C E D PH O DA PA D I NO / Bust right of the Emperor, Ferdinand I, right, holding a scepter and a sword; FERDI ROMA IMPER SEM AVGVSTVS. Dav. 9610. NGC AU 58; attractive coin with gray toning and touches of blue and gold iridescence.

Ostfriesland was ruled by counts under the overall rule of the Holy Roman Empire.