Unknown P. MI Quadrans
P. MI Series. AE Quadrans, 2nd-1st centuries BC. Obv. Head of Hercules right, wearing lion skin; [behind, three pellets]. Rev. Prow right; above, P MI; [before, three pellets]; below, ROMA. Cr. -. 2.83 g. 17.00 mm. RRRR. Extremely rare, unlisted in the standard references. Possibly unique or at least never offered in public sale. Dark green patina, porous surfaces. About VF/VF.