An little help from the
french forum
It's a sceat, a nd this
one is very close:
Continental sceat c.695-c.740, Type 8, Crude standard / Central cross pommee, pellets in angles
in this case 3 of the 4], Spink 793

English money
here
And ... there should be some specialists in this 'over the chanel' side of the forum ....