Watch List notes:

KINGS of MAURETANIA. Ptolemy. AD circa 20/1-40. AR Denarius (14mm, 1.62 g, 7h). Caesarea mint. Dated RY 20 (circa AD 39/40). RE[X PTOLE]MΩEV (sic), diademed and draped bust right / Altar decorated with R A above wreath; [PIET]–ΛTI across central field, XX (date) below. Cf. MAA 350; cf. Mazard 429; SNG Copenhagen –; Roma E-Sale 69, lot 238 (same rev. die). Most find patina remaining, compact flan, minor roughness, cleaning scratches on obverse. VF. Very rare, only one in CoinArchives.

From the D.M.K. Collection.