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Probus, AE antoninianus. Siscia mint. 22mm, 3.11 g. AD 278.

IMP CM AVR PROBVS PF AVG, radiate bust right, wearing 
imperial mantle, holding eagle-tipped sceptre.
PM TRI P COS III PP, lion walking left, head of ox before it.
Mintmark XXIT.
RIC V-2 Siscia 615 var (bust type).
Rated R4