Allectus, AE antoninianus, London.

IMP C ALLECTVS PF AV, radiate, draped, cuirassed bust right.
PAX AVG, Pax standing left, holding olive branch and vertical sceptre.
S-P across fields.
Mintmark MLXX.

RIC V-2, 30, rated scarce.

Contributed by rick2 of the Forum Ancient Coins, June, 2012