That's best answered by the following links: http://www.forumancientcoins.com/dougsmith/feac75aur.html https://www.cointalk.com/threads/aureolus-struck-in-the-name-of-postumus.269304/#post-2248222
I've been waiting for the right Postumus double sestertius to come along for my collection. Then it did, but it was consigned to me and I didnt own it. So, I waited and saved my pennies. Wouldnt you know it, just as I was near to affording it someone bought it. Well, the consignor comes first, not me, so off it went to its new home. Ah well. There will be others. I'd rather have a galley reverse anyway! Still, this one was quite magnificent in hand. Postumus, 260 - 269 AD AE Double Sestertius, Cologne Mint, 35mm, 23.05 grams Obverse: IMP CM CAS LAT POSTVMVS PF AVG, Radiate, draped and cuirassed bust of Postumus right. Reverse: Postumus in military attire holding globe and spear. RIC106 // Sear11052
Just finished imaging this old galley reverse double sest of mine literally moments before seeing your post. Rather junky and probably not in a condition you'd prefer, but these get so pricey if in decent, problem-free state.
I dont know that they exist problem free. Quality control at the time was rather lax, though one can get some wonderful antoninianii.
You're probably right. I initially wrote "relatively problem-free", but on second thought decided to go with a little optimism.
Here are my "Postumi". 1.POSTVMVS. Radiate, draped, cuir. bust r. "IM P C POSTVM VS P F AVG". Rev.: Providence stg. holding globe and transversal scepter. "PROVI DENTIA AVG". Mint:Köln: 258-268. Ant bill. (3.123 gr.) C.295a, RIC.80 & 323. EF. 2.POSTVMVS. Radiate,draped, cuir. bust r."IMP PC POSTVMVS PFAVG". Rev.: Hercules standing l. holding olive-branch and club "HERC PACIFERO". Mint:?, Ant.bill.(), Ref,: C.101, RIC.67, Sear 3012. Antiq.Bretagne, 1955.(x local hoard).
This is the only other published facing Aureus of Postumus that I know of. But he also has many other cool bust types in gold Radiate... Helmeted... Greeting... Armed with club... Armed with spear... You can also see him in a Lion skin headdress and in double portraits with various gods...