Galerius struck this issue as Augustus of the East following the abdication of Diocletian and Maximian in 305 — the first planned imperial succession in Roman history, and one that almost immediately began to collapse. The London mint was operating under the authority of Constantius I at this point, making western GENIO issues bearing Galerius's titulature a product of the brief, uneasy cooperation between the new Augusti before the system fractured entirely after Constantius died at Eboracum in 306.
The RIC VI 40a variety designation covers several die combinations from this short window.
Galerius struck this issue as Augustus of the East following the abdication of Diocletian and Maximian in 305 — the first planned imperial succession in Roman history, and one that almost immediately began to collapse. The London mint was operating under the authority of Constantius I at this point, making western GENIO issues bearing Galerius's titulature a product of the brief, uneasy cooperation between the new Augusti before the system fractured entirely after Constantius died at Eboracum in 306.
The RIC VI 40a variety designation covers several die combinations from this short window.