Watch List notes:

Diocletian, 284-305. Aureus, Antiochia 287-290, AV 5.51 g. DI – OCLETIANVS – AVGVSTVS Laureate head r. Rev. COS – II – I Emperor on horseback r., raising r. arm. C 54. RIC 310 (these dies). Lukanc 4 and p. 153, 4 (this coin illustrated). Depeyrot 7/2 (Cyzicus). Calicó 4445.
A bold portrait and an interesting reverse composition, a perfect Fdc

Ex NAC sale 71, 2013, Archer M. Huntington part II, 266. Ex HAS 22091.