Allectus. AE Antoninianus. London mint. 

IMP C ALLECTVS PF AVG, radiate, cuirassed bust right.
HILARITAS AVG, Hilaritas standing left, holding long palm and cornucopiae

S-A across fields. 
Mintmark ML. 

RIC V-2, 20; Sear 13807
Scarce.

With permission of Spink Auction 8006, Lot 1166, March 2008.