Carausius, AE Antoninianus. Camulodunum (Colchester) mint.

IMP C CARAVSIVS AVG, radiate, draped bust right.
IOVI CONSERV, Emperor facing right, receiving globe from 
Jupiter, facing left.
Mintmark SPC.

cf: HJ Berk Buy or Bid Sale 96, lot 727; Not in RIC or Webb. Akerman 64 var (IOVI CONS), unpublished. 
Extremely rare.

collection of "mauseus" of Forvm Ancient Coins, Dec. 2011