Watch List notes:

Anonymous. 157-156 BC. AR Denarius (19mm, 3.89 g, 7h). Rome mint. Helmeted head of Roma right; X (mark of value) behind / Victory, holding goad, driving biga right. Crawford 197/1a; Sydenham 376; RBW 846; RSC 6. VF, lightly toned, minor deposits. Interesting flip-over double strike.

From the RBW Collection.