Allectus. AE Antoninianus. London mint. 

IMP C ALLECTVS PF AVG, radiate, cuirassed bust right.
IOVI CONSERVATORI, Jupiter standing left, holding 
thunderbolt and sceptre.

S-P across fields. 
Mintmark ML. 

Burnett 4; RIC -; Sear -.
Rated R3.

With permission of cngcoins.com, Oct 2015.