An interesting collection would be the various bust types of Probus. Some of them are quite hard to come by, however. This one is one of my favorite Probus bust types. Show off your Probus coins! The more of the various bust types, the merrier! Probus, AD 276-282 Roman billon antoninianus; 3.79 g, 22.1 mm Rome, AD 277-280 Obv: IMP PROBVS P F AVG, radiate bust right in consular robe, eagle tipped scepter in right hand Rev: ROMAE AETER, temple, statue of Roma seated facing inside; in exergue, R * A Refs: RIC 183; Cohen 533; RCV 12027 var.