Watch List notes:

ITALY, Pisa. Repubblica. AR Grosso da 12 denari (21mm, 1.76 g, 9h). nomine Federico I. Struck 1220-1250. + IMPERΛTOR •, large F; four stars around / + S MAR • D' PISIS •, Madonna facing right, holding infant Christ; triple pellets to left. Grierson, Coins of Medieval Europe 243; MIR 394. Toned with traces of iridescence. EF.

From the Richard A. Jourdan Collection of Medieval European Coins. Ex Pegasi IV (25 September 2000), lot 779.