Watch List notes:

EGYPT, Alexandria. Gallienus. AD 253-268. Potin Tetradrachm (22.5mm, 11.10 g, 12h). Dated RY 4 (AD 256/257). Laureate, draped, and cuirassed bust right / Radiate and draped bust of Helios right; L Δ (date) across field. Köln 2892; Dattari (Savio) 5200 (this coin); K&G 90.20; Emmett 3733.4; Kellner p. 131, pl. 14, Abb. 26 (this coin). Dark gray-brown surfaces, a couple pits on the reverse. Good VF. Traces of silvering.

Ex A.K. Collection (Triton XXIII, 14 January 2020), lot 835 (part of); purchased privately by A.K from Münzen und Medaillen AG, 1970; Giovanni Dattari Collection, no. 5200.