Watch List notes:

ITALY, Papal States. Nicholas V. 1447-1455. AR Grosso (27mm, 3.78 g, 6h). Holy Year issue. Rome mint. Struck 1450. Coat-of-arms surmounted by Papal tiara; all within quadrilobe / Sts. Peter and Paul standing facing. MIR 327/1; Muntoni 10; Berman 329. Toned, tiny circulation marks and scratches. Good VF. The first Holy Year (Jubilee) issue and the earliest Papal coinage bearing a specific date. Very rare.

From the W. R. K. Great Lakes Collection, purchased from Stephen M. Huston.