Mark Antony and Octavian - Silver Denarius - 19.30mm, 3.66g
Obverse
M ANT IMP AVG
III VIR R P C M BARBAT Q P
(R P and A V in monogram)
Bare head of Mark Antony right.
Reverse
CAESAR IMP PONT III VIR R P C
Bare head of Octavian right, slight beard.

The image below was photographed by Heritage Auctions Europe. The image above is my own scan.

Minted at Ephesus (Ephesos, Greece / modern Efes, Turkey), during the spring or summer of 41 B.C. by the
Quaestor Pro Praetore Marcus Barbatius Pollio (also known as M.Barbatius Philippus).

Reference:
Crawford, M.H., "Roman Republican Coinage" (RRC), nr. 517/2.
Sydenham E.A., "The Coinage of the Roman Republic" (CRR), nr. 1181.
Sear, D.R.. "The History and Coinage of the Roman Imperators 49-27 BC" (CRI), p158, nr. 243.
Grueber, H.A., "Coins of the Roman Republic in the British Museum" (BMCRR East), nr. 100.
Babelon, E., "Descriptions Historique et Chronologique des Monnaies de la Republique Romaine" (B), Antonia, nr. 51.
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Volume 1, p289, nr.1504.
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 1, p50, nr. 8.
Seaby, H.A., "Roman Silver Coins" (RSC), Volume 1, p128, nr. 8a.

Quality: about Very Fine, small scratch on cheek of Mark Antony, some surface roughness
Rarity: S (Scarce)