Bronze (?) coin of Antoninianus Postumus [gelöst]

Dear fellow collectors,

I just got this coin as a gift from a family friend. It seems to be a coin of Antoninianus Postumus and it is in pretty good condition. It might have a very low silver content (billon), but it looks more like a bronze coin to me. I cannot seem to find the right variant on Numista though, so any help in correctly identifying it is very welcome. 

Thanks in advance!

Best regards,

Gerebernus

Hi, very nice coin.

As the Gallic Empire was struggling with the pay of its soldiers, the originally silver coins got more and more diluted with copper, thus creating billon. This is quite a beautiful example of an Antoninianus of Postumus, and the  bronze-like look is completely normal. 
Best I could find is this, looks rather similar:

N#55404

Thank you for your kind reply! I do suppose there is some very low silver content in it, it just doesn't look like it 😅 I also found that entry in the catalogue and the lettering is indeed very similar if not the same, but my example just doesn't look that ‘silver’-like at all, which is why I was confused. But it probably is that type indeed. My best wishes for 2023!

I quote: "Antoninian (Antoninianus) is the name for a coin minted in ancient Rome after 214, with a face value of 2 denarii.

It was first introduced into circulation by Emperor Caracalla under his reform of 214 or 215. According to his ordinance, the weight of such a two denarius was to be 5.11 g.
Unfortunately, I have no knowledge of the fineness of such antoninates, but it was probably similar to ordinary denarii (about 47% silver in the alloy).

As could be predicted, successive rulers gradually lowered the fineness and weight of the antoninians, so that during the rule of Gallien these coins contained about 12%(!) of silver and weighed about 3 g. And at the beginning of Aurelian's rule they were practically copper. The situation changed in 274, when Aurelian carried out a monetary reform that set the silver content of antoninates at 5%, weighing approximately 3 grams."