Marcus Aurelius sestertius Rome mint 33mm 26.28gms.
Ob: Laurate draped and cuirassed bust right. M ANTONINIVS AVG TRP XXV111.
Rev: Jupiter seated left, holding Victory and sceptre. IMP V1 COS 111, SC IN exurge. These particular titles date the coin between Dec 173 and Dec 174 AD.
Due to the way the reverse side has had all the edge chipped off and the fact that the SC has been obliterated suggest this piece may have been used as a weight or gaming counter.
RIC 1098.