Watch List notes:

PAPHLAGONIA. Sinope. Triumviral period, 39-35 BC. (Bronze, 25 mm, 8.78 g, 11 h), year 8 = 39/38. C F I AN VIII Bare head of Mark Antony to right; with an uncertain countermark or flan fault on his neck. Rev. EX D D Bare head of Octavian to right. Casey 300. RPC 2110.2 (this coin). Extremely rare, the third verifiable, and only available, specimen known. Attractive green patina with earthen encrustations. Countermark or fault on the obverse, otherwise, very fine.

From a Swiss collection, ex Nomos 18, 5 May 2019, 287.

There are apparently two other examples of this coin: the one cited in RG is apparently now lost (RPC 2110); there is a second in the Sinop Museum (RPC 2110.2).