Watch List notes:

ITALY. Papal States. Martin V (Oddone Colonna), 1417-1431. Grosso (Silver, 26 mm, 3.28 g, 6 h), Rome. · MARTI-nVS · PP · V · Martin seated facing on throne, raising his right hand in benediction and holding a cruciform scepter in his left. Rev. + · SAnTVS · PETRVS · S · P · Q · R · Crossed keys; above, crowned column (= Colonna). Berman 271. CNI XV, 13. MIR 279/1. Muntoni 12 var. Rare. Nicely toned. Some flatness, but otherwise clear and attractive. Very fine.
From the Dr. Pelc Dens Sapientiae Collection, acquired privately from Baldwin's.