Watch List notes:

EGYPT, Alexandria. Gallienus. AD 253-268. Potin Tetradrachm (22mm, 10.26 g, 12h). Dated RY 6 (AD 258/259). Laureate, draped, and cuirassed bust right / Draped bust of Serapis left, wearing ornate calathus; L ς (date) across field, vertical scepter behind. Köln –; Dattari (Savio) 5210; K&G 90.32; Emmett 3740.6 (R4); Kellner p. 133, pl. 15, Abb. 3 (this coin). Dark brown patina. Near EF. Partially silvered.

Ex A.K. Collection (Triton XXIII, 14 January 2020), lot 835 (part of).