I have a serving spoon that I believe to be silver, but not completely sure. It looks beginning of XIX century and has 3 marks that I interpret as the town mark, the maker's mark and the letter date. But I am unable to find a correct fit in my international references. Due to the date letter, candidate countries could be Denmark, Sweden, Holland, or other ?
The two towers are rather rare: I found one tower or three towers as a city mark, but no double towers.
Could someone help in this identification ?
Here are the pictures:


Thanks for every contribution.
Dinio