Roman silver hoard coin addendum No36 – reported to museum
That seems to be from the earlier range of the coins in the hoard I helped you with ID’s on last year.
Antoninus Pius, 138-161
AR Denarius, Mint of Rome, A.D. 159/60 (dated)
Obv: ANTONINVS AVG PIVS P P TR P XXIII laureate head of Antoninus Pius right
Rx: FELIC SAEC COS III Felicitas standing left, holding caduceus and leaning on column.
RIC III 298; C 360.
This is a common type and one which is repeated in several consecutive years later in his reign. You are lucky to have nearly 100% legible legends here as it might have been a bit more involved guesswork to figure out what was happening on the reverse if the legend were not so clear.
Unfortunately I have no prepared photos of my own of anything even particularly similar for comparison’s sake – but this is from acsearch:
Diameter: 17 mm