Very rare antoninian of Emperor Quintillus, who reigned after the death of his brother Claudius, according to various sources, several days or about two or three months. The number of coins minted during his reign testifies rather to a few months of reign.
Less common variant with the letter S in the right field on the reverse.
Roman Imperial
Quintillus (270), Antoninianus 270, Romemint
Obverse: radiate, draped and cuirassed bust right
IMP C M AVR CL QVINTILLVS AVG
Reverse: Providentia standing facing, head left, holding sceptre and baton, with globe at feet, S in right field
PROVIDENT AVG
Weight 1.44 g