Watch List notes:

POLAND, Monarchy. Mieszko III Stary (the Old). As Duke of Greater Poland, 1181/2-1202. AR Bracteate Denar (20mm, 0.23 g). Kalisz mint; Jackob, moneyer. Struck from 1182/3 or 1186. Eagle standing left, head right; to left, Jakob in Hebrew / Incuse of obverse. Gorińska type 23; Gumowski, Hebräische 260 (Mieszko Młodszy); Kopicki 140; Frynas 9.54. Toned. VF.

From the Dr. Jay M. Galst Collection. Ex Daniel M. Friedenberg Collection (Goldberg 25, 31 May 2004). lot 3199 (part of).

Some references attribute this type to Mieszko Młodszy (the Younger), who was Duke of Kalisz from 1186-1193.