Galerius, as Augustus, AR Argenteus. ca 305-306 AD. 

MAXIMIANVS AVG, laureate head right
VIRTVS MILITVM, three-turreted camp gate, arch open, no doors.

Mintmark dot SM dot SD A dot.

Freeman & Sear - Mail Bid Sale 14, Lot: 501
Sold for $1540
Freeman & Sear Mail Bid Sale 14 closed June 21st, 2007.