Watch List notes:

L. Memmius, Accidentaly incuse denarius, Rome, 109 or 108 BC; AR (g 3,88; mm 19; h 12); Young male head r. wearing oak-wreath; before, *, Rv. Incuse of obverse. Crawford 304/1; Memmia 1; Sydenham 558.
Countermark on reverse, very fine.