Watch List notes:

House of Hohenstaufen (1194-1268), Frederick II (King of Sicily, 1198–1250; King of Germany, 1212-1220; Emperor, 1220-1250), Denaro, Messina or Brindisi, 1249; BI (g 0,67; mm 16; h 9); + ROM INPERATOR, in field F with three stars, Rv. + R IERSL ET SICIL, cross with four pellets. Spahr 148; MEC XIV, 570-571; Travaini 48.
Green patina, good very fine.