Quinarius Aureus - Diocletianus IOVI CONSERVAT AVG, Jupiter

The quinarius aureus — half the weight of a standard aureus — was revived under Diocletian as part of broader monetary restructuring in the years before the better-documented reforms of 294 AD. Exactly why certain issues were struck at this denomination during 284–294 remains debated; some scholars tie them to specific donatives or military payments where fractional gold was administratively convenient rather than commercially circulated.

RIC V.2 151B is a scarce type. Most Diocletianic gold from this period entered the ground in hoards rather than wearing through daily use, which accounts for the survival of reasonably preserved examples despite low original mintage.