Watch List notes:

Diocletian, 284 – 305. Argenteus, Siscia circa 295, AR 3.06 g. Laureate head r. Rev. Turreted camp gate with the four tetrarchs swearing over tripod. C 483 var. (omits SIS). RIC 49.
A flan crack at 2 o'clock on obverse, otherwise good extremely fine