Regalianus, AE antoninianus. Carnuntum mint. AD 260. Overstruck on a coin of Gordian III(?)

IMP C REGALIANVS PIVS F AVG, rudimentarily radiate, draped
bust right.
CONCORDIA AVGG (and traces of GVSTI from the host coin),
Regalianus and his wife standing facing each other, altar 
between them.

RIC V-2, 1; Sear 10840.
Extremely rare.

With permission of Numismatica Ars Classica, Nov 2007.