I have a specialist book on English Celtic coins by Commander R.P. Mack, MVO, publ. Spink London,1975. I will have a good dekko through it within a couple of days. May help, but I don't have high hopes.
Other Celtic tribes across Northern Europe also issued coins, but I don't have a reference that covers these. Sear touches briefly on these issues.
UPDATE:-
The pellets are a bit reminiscent of the coins of the Durotriges of Southern England; I have a base silver stater from this tribe, but the markings are nowhere similar enough. I examined 33 plates of coins at the back of the book, but to no avail.
Edited by sel_69l
04/03/2012 05:47 am