Watch List notes:

The Roman Empire

Diocletian, 284 – 305. Aureus, Lugdunum 285-286, AV 4.41 g. IMP C C VAL DIOCLETIANVS P F AVG Laureate and draped bust r. Rev. M – ARS V – I – CTOR Mars walking r., holding spear and trophy. C 313. RIC 2b. Bastien, Lyon 1. Lukanc 2. Depeyrot 1/1. Calicó 4543 (these dies).
Wonderful reddish tone, an almost invisible mark on obverse,
otherwise good extremely fine

From a private American collection.