First allow me to start this with stating how beneficial I have found this site and its links to othersites.
Please bear with me as this is my first time posting.
My inquiries concern Dutch / German silver.
I have acquired quite a few teaspoons and some serving spoons with the Bremen key mark.
The first is the Bremen key mark & C. Koch. I am assuming this is prior to the partnership with Bergfeld.
I don't know if the key mark was just the "assay" mark or is it purity mark as well? If it is a purity mark as well, does it signify coin or sterling as they are not marked either.
These are mono'd & dated 1850
![Image](https://i.postimg.cc/LJLvgwJT/20180926_172352.jpg)
The second also shows the Bremen key mark but in shield cartouche with what looks like the letter "F with arrow?" on a diamond.
![Image](https://i.postimg.cc/crBfdy6y/20181007_135748.jpg)
The third, again with the Bremen key mark in a diamond shaped cartouche with a partial mark of either an "M" or "W".
These were prick etched 1820 & initials.
![Image](https://i.postimg.cc/WhvMRbNw/20181007_134951.jpg)
Any assistance/knowledge would be greatly appreciated.
Surfer of Silver