Watch List notes:

ITALY, Papale (Stato pontificio). Gregory XIII. 1572-1585. Æ Medal (35mm, 16.55 g, 12h). Holy Year issue. By Gianfederico Bonzagni. Dated 1575 (though a later cast). Bust left, wearing mantum and zucchetto / Gregory standing left, opening Porta Santa (Holy Door) with pick; attendants and worshippers around; angels above. Modesti 710. Brown surfaces. VF.

From the Peter J. Merani Collection. Ex Artemide Aste 24 (28 March 2009), lot 1082.