Watch List notes:

LORDSHIP OF CHIOS. FILIPPO MARIA VISCONTI, 1421-1436. Ducat of Venetian type. St. Peter gives a banner to the kneeling duke, .D. MEDIOLAN / .S. PETRVS / DVX Rv. Chr.ist in mandorla, SIT T. XPE DAT Q TV - REGIS ISTE. DVCA. 3.50 g. Schl. XIV, 14. Die break on reverse.
Very fine

Ex Lanz Numismatik, München, Auktion 49, 23. 5. 1989, lot 1030.