More beauties for my portrait collection!
Trebonianus Gallus was a close ally of Trajan Decius, and unexpectedly was proclaimed emperor in the summer of 251 when Decius and his son perished in battle against the barbarians. Gallus ruled briefly with Decius' surviving son Hostilian, but Hostilian seems to have died of illness less than a month or two into the joint reign. Gallus then elevated his son Volusian, and the two of them rode Rome straight down the drain; paying off the barbarians, debasing the currency, and ignoring a major Persian campaign into the Roman East. They were killed by their own troops just over two years later, in favor of the usurper Aemilian.
IMP CAE C VIB TREB GALLVS AVG, radiate, draped and cuirassed bust right.
LIBERTAS AVGG, Libertas standing left with pileus and sceptre, star in right field.
RIC 38

IMP CAE C VIB VOLVSIANO AVG, radiate, draped and cuirassed bust right / P M TR P IIII COS II, (emperor as?) Genius of the Senate, standing left, holding branch and sceptre. RIC 140

These came as a large lot of similarly high grade coins of the two emperors; I'll try to get more images up soon!
Feel free to contribute any information, or coins you have of the emperors!