Severus Alexander? Nicaea Bithynia - standards and eagle, AE20 222-235 AD

Description

This coin is clearly from Nicaea Bithynia, most likely Severus Alexander though reverse style was used in other reigns, this one is the most similar and to SNG Cop 519, though the eagle is seems to be on an altar, so I didn't find the exact attribution.  Head and details on the obverse are pretty unclear, though parts of a few letters of the legend are almost discernable.  The reverse is off-center and shows the KIAE of
NI-KAIE-ΩN
and depicts one of the two standards (other off the flan) and an eagle on an altar?.  Coin seems to have a porous surface.  See photos.
Ship to US Only
Will try to reduce/combine shipping for multiple order - please ask for Invoice.