Commios gold stater, Atrebates. 50-25 BC. Commios (or Commius; he spelt it with an OS in the Celtic way, not US in the Roman way), was the first British king to print his name on coins.
This is what Chris Rudd calls the Commios muzzles type. Wreath design with two hidden faces. Reverse is a horse right, wheel below, charioteer's arm and three horse muzzles above. COMMIOS below and in front.
Van Ardsell 350, BMC 724-727. Spink 65.
See PAS Record
http://finds.org.uk/database/artefacts/record/id/208933