
Hi Athos,
During the Napoleonic French era, Em(b)den and the surrounding lands of East Frisia were part of the short-lived Kingdom of Holland with the city assay office mark a pair of pliers in an oval shield used 1807-1812
According to Marc Rosenberg : Emden (Hannover)

I agree it comes close but I have some doubts, I move it to the German section and I leave it for Theodrich to decide.
Best,
Oel.