Watch List notes:

Antoninus Pius. AD 138-161. Æ Quadrans (18.5mm, 3.19 g, 3h). Rome mint. Struck AD 139. Laureate head right / Club and winged caduceus crossed. RIC III 573. Brown patina, long flan crack, some roughness. Fine. Very rare.

Purportedly Ex Sir Charles Oman Collection (Christie's, 2 July 1968), lot 194, part of large lot.