Diocletian. AD 284-305. Antoninianus (24.5mm, 3.63 g, 6h). Rome mint, 1st officina. Radiate and cuirassed bust right / Jupiter standing facing, head right holding scepter and thunderbolt; eagle at feet to left, head right; [XX](wreath)IA. RIC V 166. Brown patina, misaligned double struck on obverse, slight rotated double strike on reverse, some roughness. Near VF. An interesting mint error.