5.73g, 17.13mm
'This is quite a rare type, as you no doubt appreciate. The best parallel is provided by three coins in the British Museum, listed in their catalogue as nos. 3353-55. It's one of a group of coins loosely described as the Snettisham staters, because several of the types were first recognized in one of the Snettisham (Norfolk) hoards of the early 1990s. The exact type is not in Van Arsdell although it's closely related to the North Thames types listed as VA 1500, 1502 and thereabouts. It is presumably an East Anglian type, although because of the stylistic similarities there must have been some very strong link between the producers of the Snettisham types and the North Thames types. Date c. 50 - 40 BC, I think.
I'll record it as CCI 07.1164. '