Diocletian, 284-305. Antoninianus (Silvered bronze, 23 mm, 3.99 g, 6 h), Siscia, 288. IMP C DIOCLETIANVS AVG Radiate and cuirassed bust of Diocletian to left. Rev. CONSERVATORI AVGG / XXIB Diocletian, on the left, and Jupiter, on the right, each holding scepter and patera, sacrificing over lighted altar. Cohen 42. Margetic, Siscijska, p. 53, 53 (this coin). RIC 262. Very rare and unusually well preserved. Thin flan crack, otherwise, nearly extremely fine.