Watch List notes:

Anonymous. AE As, 157-156 BC. Obv. Laureate head of Janus; above, I. Rev. Prow right; before, I; below, ROMA. Cr. 198B/1a. AE. 24.27 g. 32.00 mm. R. An attractive example of this rare issue. Lovely untouched earthen dark green patina. Good VF. Crawford warns that supposed examples of this issue are often mis-read pieces where a moneyer's mark above the prow has been removed by wear.