Carinus Billon denarius, AD 283–285. 2.76 g. Rome mint.

IMP CARINVS PF AVG, laureate, cuirassed bust right with 
slight drapery on left shoulder.
P M TR I P COS PP, Carinus, holding olive branch, driving 
slow quadriga right.

RIC V-2 226 var (listed only as aureus); Cohen 79 var (ditto). 

Extremely rare

Sold by Frank Sternberg AG auction 35, Lot 756, Oct. 2000.
Another, from the same dies, sold by Numismatica Ars Classica auction 84, Lot 1153, May 2015.