Watch List notes:

FRANKISH GREECE AND THE ARCHIPELAGO:ACHAIA. UNCERTAIN 14th AND 15th CENTURY AEGEAN AREA ISSUES. Ducat in imitation of a Venetian issue of Tomaso Mocenigo. St. Mark hands the ducal banner to the doge. Rv. Chr.ist in mandorla. Blundered legends on both sides. 3.53 g. Schlumb. XIV, 12, Lunardi CS16.
Extremely fine

Ex Numismatik Lanz, München, Auktion 49, 23. 5. 1989, lot 1027.