Vetranio (350-350 A.D.) -  AE2 Centenionalis / Billon Heavy Maiorina - 21.26x22.64mm, 5.08g
Obverse - DN VETRAN-IO PF AVG Vetranio, his laureate, draped and cuirassed bust right.	Reverse - CONCORDIA MILITVM Emperor in military dress standing facing, head to left, holding in each hand a standard with Chi-Rho on the banner; over his head, a star. A in left field, B in right field; dot TSA dot in Exergue.
The image below was photographed by Jeroen van der Meulen from RomanCoinShop. The image above is my own scan.
Minted at the 1st officina (A) in Thessalonica (Saloniki, Greece), between 1 March and 25 December 350 A.D. Reference: Kent, J.P.C., "Roman Imperial Coinage", Volume 8 (RIC), Thessalonica, p414, nr. 132. Voetter, O., "Die Münzen der römischen Kaiser, Kaiserinnen und Caesaren von Diocletianus bis Romulus, Katalog der hinterlassenen Sammlung und Aufzeichnung des Herrn Paul Gerin", (Voetter-Gerin) Thessalonica, p346, nr. 1. Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol 5, p245, nr 18834. Carson, R.A.G., Hill, P.V., & Kent, J.P.C., "Late Roman Bronze Coinage" (LRBC),  Part II, p78, .nr 1658. Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II),  p1054, nr. 40 (B2, O2, R1, T04, M2, Exe: dot TSA dot). General referenve works (no exact determination possible): Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 7, p3, nr. 1. Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D." (Fm), nr 415V. Kampmann, U., "Die Münzen der römischen Kaiserzeit", 2nd edition, (Kampmann) p449, nr. 151.7. Van Meter, D., "Handbook of Roman Imperial Coins" (VM), p303, nr 6. Quality: Very Fine-, with part of the obverse legend off the flan Rarity: Scarce