Papal States (1667-69) piastra Dav-4072
Silver piastri are popular with collectors not only for their Catholic associations but also the extraordinarily vivid portraits of the various popes. This type, issued for Clement IX without date, is scarce. On the reverse, four seraphim support the throne of St. Peter.
Recorded mintage: unknown.
- Berman, Allen G., Papal Coins, South Salem, NY: Attic Books, 1991.
- Cuhaj, George S., and Thomas Michael, Standard Catalog of World Coins, 1601-1700, 6th ed., Iola, WI: Krause Publications, 2014.
- Davenport, John S., European Crowns, 1600-1700, Galesburg, IL, 1974.