Watch List notes:

Didius Julianus (193), Denarius, Rome, 28th March - May (?) AD 193; AR (g 3,74; mm 19; h 11); IMP CAES M DID - IVLIAN AVG, laureate head r., Rv. CONCO - R - D MILIT, Concordia standing l., holding standard and legionary eagle. RIC 1; C 2.
Very rare, old cabinet tone, minor lack of metal on reverse, about extremely fine.