http://augustuscoins.com/ed/Carus/ I have added a Carus with three G's to the page. Carus. 3.88 grams. 21-20 mm. IMP C M AVR CARVS PF AVG VIRTVS AVGGG (three Gs for three rulers) * Δ XXI RIC V.II Carus 125, Antioch mint, page 150, Plate VI.17 The sequence of events leading up to there being three simultaneous rulers is 1) Carus became emperor at the end of August 282 2) Carus elevated Carinus to Caesar in autumn 282 After this point in time reverse legends that would have had "AVG" with one ruler change to have the plural form "AVGG" 3) Numerian was made Caesar late autumn 282 After this point in time reverse legends that would have had "AVGG" can have "AVGGG" with three Gs for three rulers, but that change actually happened only at Antioch (the location of their promotion); the rest of the mints retained AVGG. Coins of Carus with AVGGG that may belong to this period might also belong to the next because they continue unchanged into the next period. The next event changes the obverses of coins of Carinus and Numerian. 4) Carinus and Numerian were promoted to Augustus February/March 283 After this point in time their obverse legends change from CAES to AVG, but the reverse number of Gs does not change. 5) Carus dies c. autumn 283 After this point in time legends of Carinus and Numerian revert to AVGG, with only two Gs for the two remaining rulers. So the date of this coin is "late autumn 282 to c. autumn 283." I think it is neat that we can have a coin over 1700 years old that can be dated to within a year. There is more on the page. http://augustuscoins.com/ed/Carus/ Show us anything related!