Watch List notes:

ROMAN EGYPT. Antoninus Pius, 138-161 AD. AR Tetradrachm (12.47 gm), yr. 2. Laureate bust with slight drapery / Nimbate Phoenix. Köln.1290. Toned VF. Issued in connection with the beginning of the Sothiac Cycle in 139 AD, which marks the coincidence of the Vague year and Sothiac year, which occurred after the completion of 1461 Vague years and 1460 Sothiac years. BMC.lvi. Rare.