An interesting and complete artifact! There certainly seems to be some writing on both sides of the bust...
Can you tell us how you have determined the Merovingian origin of this item?
As what looks like N seems backwards, I have flipped the image - maybe it will help somehow?

Can you tell us how you have determined the Merovingian origin of this item?
As what looks like N seems backwards, I have flipped the image - maybe it will help somehow?























