Did you get a ID on this coin? if not Email, Martin Allen mra25@cam.ac.uk with some photos and a ID request , I am sure he will be able to help...
It's either a Anglo-Saxon thrymsa or a continental Merovingian tremisses .....
thanks again rusty you were spot on. I Emailed martin allen and this was his reply
Hi Melv,
Your coin is a Merovingian tremissis, but I have been unable to identify it from the works of reference on Merovingian coins. This is not unusual as there are thousands of different varieties of Merovingan tremissis, many of which have never be fully identified.
I shall take advice on this from an expert on Merovingian coinage.
Best wishes,
Martin
if I here any more on this I will post further details here
thanks to all
melv