Probus. AE antoninianus. Siscia mint, struck AD 278. 

IMP C M AVR PROBVS AVG, radiate, draped and cuirassed bust right. 
PROVIDE AVG, Providentia standing left, holding globe and sceptre.

Digamma in right field. Mintmark XXI.

RIC 716; Sear 12010.

With permission of Eidmar auction 5, (on biddr.com), Nov. 2024.