Severus Alexander, Potin Tetradrachm of Alexandria, Egypt. Dated Year 4, AD 224-225. 24 mm, 11.70 g.

A KAI M AYR CEOYHR ALEXANDROC EYCEB, laureate, draped and cuirassed bust right.
L TETARTOY, Serapis standing front, looking left, holding transverse sceptre and raising right hand

Dattari 4356; BMC 1658; Milano 1508.

Image courtesy of the British Museum.