Watch List notes:

Maximianus, first reign, 286-305. Antoninianus (Billon, 23 mm, 3.92 g), Siscia, 2nd officina, 287. IMP C MAXIMIANVS AVG Radiate and cuirassed bust of Maximianus Herculius to right. Rev. CONSERVATOR AVGG / XXIB Diocletian (!) and Jupiter standing facing each other, both holding long scepter, and jointly sacrificing on an altar. Cohen -. RIC - (but cf. 261-262 of Diocletian and 579 for Maximianus. An extremely rare and possibly unpublished mule. Nearly extremely fine.