Gallienus AE tetradrachm of Alexandria, Egypt. Dated Year 15 (sole reign, AD 267-268). 10.08 g.

AYT K P LIK GALLIHNOC CB, laureate and cuirassed bust right.
Date L EI to left of Poseidon standing left, right foot on dolphin, holding palm frond (or corn-ear?) and trident, 
palm branch in right field.

Milne 4155; Koeln 2953; Dattari (Savio) 5259; Kampmann 90.108; Emmett 3827.15. 
Very rare.

With permission of cngcoins.com, auction 442, Lot 857, April 2019.