The obverse is corroded; but the reverse is where it is happening. Since there is no wear and some of the silvering is present; I grade this one as "about uncirculated"
Diocletian
A.D. 293
Æ Antoninianus 22x23mm 4.5gm
IMP DIOCLETIANVS AVG; Radiate, draped and cuirassed bust right.
P M TR P VIII COS IIII P P; radiate lion walking left, holding thunderbolt in its mouth
In ex. A ✶
RIC Vii Lyon 5; Bastien 463 (10 ex.)