"Anonymous. Ca. 157-155 B.C. AE as (31.8 mm, 24.70 g, 3 h). Rome mint. Laureate double-head of Janus; above, I (mark of value) / ROM[A], prow of galley right; to right, I (mark of value). Cf. Crawford 197-198B/1. Near VF for type, well centered but slightly uneven strike makes Janus' left face weak; dark green patina with lighter-colored moderate deposits in fields and recesses. "