Watch List notes:

Spurius Afranius. 150 B.C. AE as (31.2 mm, 22.56 g, 2 h). Uncial standard. Rome mint. Laureate head of Janus; I above / SAFRA / ROMA, prow of galley right; dolphin to right. Crawford 206/2; Sydenham 389. Fine. 

Ex RBW collection (not in previous sales). 

Crawford explains "Since there is never a point between S and AFRA, Safra should be regarded as the moneyer's cognomen (not otherwise known) rather than representing S(p). Afra(nius). p. 251, Roman Republican Coinage