Valerian I potin tetradrachm of Alexandria, Egypt. Dated Year 1. AD 253-254. 21.5 mm, 9.87 g. 

A K P LI OVALERIANOC EV EVC, laureate and cuirassed bust right.
L-A to left and right of Alexandria, turreted, standing left, holding sceptre and raising right hand. 

Milne 3871; Geissen 2851; Dattari (Savio) 5142 (this coin); Emmett 3702.1
Ex A.K. Collection.

With permission of cngcoins.com, auction 463, Lot 267, March 2020