Similar to a recent Probus thread that included discussions on issue "phases", I have a question on this common Aurelian coin. It's easy enough to attribute (or maybe not). Aurelian Siscia mint, 4th officina. 7th emission, AD 274. Ob: IMP C AVRELIANVS AVG - Radiate and cuirassed bust right R: CONCORDIA MILITVM - Emperor standing right, clasping hands with Concordia standing left; Q*. RIC V 244 However with all coins, I like to check the most recent references to have the most accurate and complete attribution. The MER RIC program is the "the preliminary step to the revision of the Roman Imperial Coinage V.1." Many errors in RIC V are updated here and more information and relevant examples are available of each coin. http://www.ric.mom.fr/en/home If you look up this coin on the site, three results are returned. All exactly the same and attributed to the old RIC 244 number and Issue 7 but with separate updated temporary numbers. The difference between the results is only the "Phase." Seemingly identical coins are listed in the three results as Phase 1, 2 and 3. 3 returned results My question to anyone who may know Aurelian coins to this level of detail is... how can you tell between the different phases? The coins look identical, with identical bust types, inscriptions and officina marks. The weights for examples across the phases are all over the place... how can you tell the difference? I guess many would ask... "Does it even matter?" No, probably not but these are details that I like to figure out if I can. As always, show your Aurelian RIC 244 coins or anything else relevant you'd like! Thanks!