Watch List notes:

Mark Antony. AR Quinarius, 39 BC. III VIR-RPC. Diademed head of Concordia right. / M. ANTON. C. CAESAR. Two hands clasped around caduceus. Cr. 529/4b. B. (Antonia) 42. AR. 1.69 g. 14.00 mm. R. Rare. An outstanding example, sharply struck and superb. Lovely old cabinet tone. About EF.

The issue should be regarded as marketing the reconciliation between Octavian and M. Antonius which took place at Brundisium late in 40 BC. (RRC I, p. 533).