Watch List notes:

Anonymous [Butterfly and Vine-branch]. Ca. 169-158 B.C. AE as (33.7 mm, 24.41 g, 7 h). Rome mint. Laureate head of bearded Janus; above, I / ROMA in exergue, prow of galley right; above, butterfly on vine-branch above; in right field, I. Crawford 184/1a; Sydenham 296. g Fine, green patina. Scarce. 

Ex RBW collection (not in previous sales).