Numerian. 283-284 AD. Antoninianus. Cyzicus mint. 

IMP C NVMERIANVS P F AVG, radiate, draped bust right.
CLEMENTIA TEMP, Numerian standing right, receiving Victory on 
globe from Jupiter, standing left, holding sceptre.

B in lower centre, XXI below, 

RIC V-2, 463; Sear 12243.