a very small piece of a Merovingian or maybe Anglo-Saxon coin , got from a bracelet bought in UK 23 years ago

Was with many small coins. 

unresearched, 

two users of numismatic forum said to me seems some token or coin related to issues made in the post crondall type. in their opinion is a thrymsa. . But i have no idea.

 Anyway was together in the same bracelet, with more different (some listed here now).

seems circulated , so probably is a good coin. The key is if Merovingian or Anglo Saxon? An expert opinion is needed

1.22 grams of silver