I have found a similar but not this one? 3.1 grams 18mm only 58% silver according to XRF The head looks to be to young compared to other Antoninus coins Thank you for looking Problem solved Thank you for your help on this Not an Antoninus Pius, but a Elagabalas,
Elagabalus, laureate, draped, right, IMP ANTONINVS PIVS AVG, rev Legionary eagle perched between two standards with one or two shields at the foot of each standard, FIDES MILITVM, 3.05g, (RIC IV.2 78) .
Thanks guys, I read the title, then saw the coin and my head nearly exploded. OP, most emperors have portraits that you can roughly identify them. I would try to learn portraits over time. Even though I cannot read legends many times and have trouble with Greek I usually can narrow down emperor just on portrait. The main exceptions are the rarer provincials like Olbia or Mesopotamia where portraiture was cruder.
Nice coin, I'm doing my best to not get into collecting Roman coins. Coins like this one make it so tempting.
The coin is surely authentic but there is a bizarre blunder in the reverse legend : the F is not a F...
The F is quite consistent with the formation of Fs for this coinage. There is a vertical bar, probably punched and then two horizontal bars with serifs at the end. Here the serifs have almost merged. If you look the E of FIDES is formed in a similar manner.