I'm sorry, You'r right. I
still don't know which one it is as there looks like there 5 which have the same attributes. However, I choose this one:
Obv: GALLIENVSAVG -
Head right with
radiate crown.
Rev: DIANAECONSAVG - Gazelle walking left.
XII in
exergue.
RIC.181, VM.49/7, SR.2953,
RSC.165, CT.1408, Göbl.750b (194 examples)
Is it the right one? It's the only one that match the horns.