Severus Alexander, AE21 of Nicaea, Bithynia.

M AVR CEV ALEXANDROC AVG, laureate, draped, cuirassed bust right,
 seen from the back.
NI-KA-IE-WN between the masts of three standards with one
badge and two bars each.

Kemppinen 204; BMC 103 var (obv legend + bust type + rev breaks)

With permission of Roland Müller, 2013.