Please Help ID Roman

This is a billon Antonininus of the emperor Gallienus 260-268 AD, Ric#616a

I think you were correct Meldercat - I get much the same as you.

Radiate, draped from rear and the male Mercury with purse and caduceus rather than the female Providentia with baton and cornucopiae. Probably the Anitoch mint, RIC V-1 (S), Asian Mint 653 var, Göbl 1651f var, RSC 875. The var referring to the coin not having 'SPQR' in exerge.

I think echizento may be referencing a similer Gallienus Laetitia coin?

Many of the early billions of Gallienus are of good silver content (40%) and of decent workmanship and artistic style. Coins from later in his reign were often dark, irregular, hastily struck, and generally of poor quality with much of the legend off the flan. Postumus was, on the whole, considered to produce better quality coins where their reigns overlapped.

From about AD 260, silver coinage (outside the Gallic Empire) was completely debased and hyper-inflation occurred. During the second half of Gallenius' reign, prices rose by a factor of about 20! Bankers refused to accept the vast quantities of 'low quality' coins which were being minted. 'Low quality' referring mainly to their lack of precious metal content, but later to their reduced size and irregular shapes etc.

Gallienus antoninianus had its silver content reduced to perhaps just 1 or 2% and a thin silver coating, eventually even this stopped with coins being produced completely of base metal.

This coin is nicely centred, well stuck and on a nice round flan - certainly not the norm for its late estimated mint date of 266-267 (I would say it looks earlier than this?). The coin does seem to have a little silvering left but this may just be the photo?

I cant tell if the areas around the eyes, nose and neck are silvering or just remnants of patina.