4.01g, Cyzicus Mint
Obv: 'IMP CC VAL DIOCLETIANVS AVG' Diocletian wearing radiate crown right.
Rev: 'CONCORDIA MILITVM' Jupiter handing Diocletian a globe with victory on top, 'G' between, 'XXI' in ex
The Antoninianus (pre 296 reform) differs from the reform radiate in the the XXI is not used on the reformed issue.
A couple of small cleaning scratches
RIC 306