Vetranio - Augustus of Imperium Romanum from 1. March 350 to 5. December 350
Flavius Vetranio Augustus was a Roman soldier and statesman, a native of the province of Moesia (in modern Serbia). He was briefly Augustus of the Roman Empire between the 1. March – 25. December 350.

He was asked by Constantina, the sister of Roman Emperor Constantius II, to proclaim himself Emperor. Her brother Constans had been killed by Magnentius earlier that year and she probably thought Vetranio could protect her family and herself against the usurper. Vetranio accepted, and coins were minted in his name.

When Constantius II returned from the East to deal with the usurper, Vetranio willingly surrendered the purple to him. He was allowed to live the remainder of his years as a private citizen on a state pension.
Vetranio
Emperor Vetranio of the Roman Empire

(1) Vetranio 350 AD
Obverse: DN VETRANIO PF AVG, laureate draped and cuirassed bust right, A behind bust
Reverse: CONCORDIA MILITUM, Vetranio in military attire standing left, star above head, holding labarum in each hand
Ref: Sear 18903
Obverse: Pearl-diademed draped ciurassed bust right; D N CONSTAN_TIVS P F AVG / A _ *
Reverse: Constantius standing left, holding labarum, being crowned by Victory; HOC SIG_NO VICTOR ERIS / A / ·ESIS·
Ref: RIC VIII Siscia 286
(3) Vetranio | Constantius II 350-351 AD
Obverse: pearl-didemed, draped and cuirassed bust right; D N CONSTAN_TIVS P F AVG / A
Reverse: Constantius II facing, head left, holding standard with . banner in each hand, star above; CONCORDIA__MILITVM / III / ΔSIS crescent
Ref: RIC VIII Siscia 301
Obverse: Pearl-diademed draped ciurassed bust right; D N CONSTAN_TIVS P F AVG / A _ *
Reverse: Constantius standing left, holding labarum, being crowned by Victory; HOC SIG_NO VICTOR ERIS / A / •BSIS*
Ref: RIC VIII Siscia 291