4th emission of Serdica, IMP C M AVR PROBVS P F AVG, Radiate, draped and cuirassed bust right, seen from the back. / VIRTVS PROBI AVG, Emperor galloping right, spearing enemy falling before, his shield lies behind him. KA.D. (D is Delta).
Date: ca.277AD.
Diameter: 23mm max
Weight: 3.29g
Catalogue ref: RIC 877