ELEVEN ROMAN COPPER ALLOY OR BILLON COINS BEARING THE NAME OF CONSTANTINE. indicating Constantine I (ruled 307 - 337 CE), Constantine II (Caesar, 317 - 337), or Constantine III (407 - 411), comprising: a billon siliqua (18 mm.); one copper alloy (about 23 mm.), another (21 mm.), four (20 mm.), and four (about 18 mm.) Estimate $200-300