CNG ebay - Diocletian, under Carausius! AE Ant.
11/17/99.

 Diocletian. 284-305 AD. Æ Antoninianus (4.46 gm). Struck under
 Carausius, circa 290-293 AD. "C" mint in Britain. IMP C C VAL
 DIOCLETIAN P AVG, radiate and cuirassed bust right / PAX A-VGGG,
 Pax standing left, holding branch and vertical sceptre; S-P/C.
 RIC V pt. 2, 21 var. 
Very Rare! 717246