Watch List notes:

AUSTRIA, Holy Roman Empire. Duchy of Styria. Friedrich III. Emperor, 1452-1493. AR Pfennig (15mm, 0.45 g). Graz mint. Dated (14)56. Coat-of-arms surrounded by trilobe with letter F R I in lobes; 5 6 above / Blank. Levinson IV-2; Frey 91A; CNA Fb 5a. Toned, minor roughness, usual crude strike. VF. Includes an old German collection ticket.

From the W. R. K. Great Lakes Collection of Early Dated Coins.

The first coin to use a modern numeral 5.