R1581- Probus (A.D. 276-282), Billon Reform Antoninianus, 4.57g., Siscia mint (Sisak, Croatia), fourth officina, radiate bust of Probus left wearing imperial mantle, holding eagle-tipped scepter, IMP C M AVR PROBVS AVG, rev., Pax standing left holding olive-brach and transverse scepre, PAX AVG, XXI in exergie, Q in field left, (RIC 707 var), practically as struck, fully silvered. $195