A new coin from a group of 19 coins that just arrived. Trajan Decius, 249-251. Antoninianus, (2.7g, 21mm) Rome. IMP C M Q TRAIANVS DECIVS AVG . Rev. GENIVS EXERC ILLVRICIANI It came with an old auction tag from Otto Helbig Nachf Auction 86 held in Munich in 1942. - auction listing It looks like it is over-struck on a denarius.. Maybe Serverus Alexander.. I can see the back of a head on the reverse.. + Here is everything that i just got. Mostly 3rd century Denarii/Antoninianii.. all of the coins came with tags from the same 1942 auction.. supposedly old stock from the company, but Idk why they were all kept together for 80 years..