Trebonianus Gallus (251-253 A.D.) -  Silvered AE Antoninianus - 22.33x19.83mm, 4.68gr
Obverse - IMP C C VIB TREB GALLVS PF AVG
Trebonianus Gallus, his radiate, draped and cuirassed bust right
Reverse - PAX AVGVS
Pax standing left, holding olive branch in left,
and transverse scepter in right hand.

Minted in Antioch (Antakya, Turkey) 252 A.D.
Reference:
Mattingley, Sydenham, & Sutherland, "Roman Imperial Coinage", Volume 4, Part 3 (RIC), p168, nr. 86
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol. 3, p232, nr. 9641
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 5, p247, nr. 80
Seaby, H.A. & Sear, D.R., "Roman Silver Coins" (RSC), Volume 4, p37, nr. 80, variety without star in reverse field, and no dots.
Van Meter, D., "Handbook of Roman Imperial Coins", p236, nr 25
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p276, nr 14  (B2, O2, R24, T21, M1)
Quality: Fine+/Very Fine-, with partial silvering on obverse, and full silvering on reverse.