Watch List notes:

Diocletian. A.D. 284-305. AE antoninianus (23.76 mm, 3.83 g, 12 h). Ticinum mint, Struck A.D. 285. IMP C C VAL DIOCLETIANVS P F AVG, radiate, draped and cuirassed bust of Diocletian right / CONS-ERVAT AVG, Sol, naked and radiate, striding left raising hand and carrying whip // SXXIT. RIC V 206 var. (bust type). VF, olive-green patina. 

RIC does not list "draped and cuirassed" for this type, only "draped bust" and "radiate head".