Please hellp with the hallmark of the Danish spoon - triple JAM

[SpoonLover]

This Danish spoon has triple hallmark: JAM and the engraved date: 1809. Please help to identify whom belongs this hallmark.

See the pictures here:
https://imgur.com/a/B1oNHQj
Apparently on the spoon is engraved: "Foner Jensen S.M. i Grödebüll 1809"
Now in Danish Grödebüll is written Grødebøl. S.M. abbreviation probably - Seamen's Mission?
Thank you.

[dognose]

Hi,

Please embed your images.

Trev.

[SpoonLover]

[Qrt.S]

Hi,
Your spoon is Danish and made by Johan Adolf Müller in Haderslev. He was born 13.1.1761 in Tønder, master 7.5.1789-25.1.1850. Known to have made spoons among other cutlery etc..

[SpoonLover]

So much appreciation, thank you very much!
Do you happen to know if the triple hallmark means silver for provincial Danish items?
Thank you!

[Qrt.S]

The Danes had their own mark for fineness BUT! Sometimes the fineness punch was not used for some reason especially in the countryside. Instead the maker's mark could be punched two, tree times....
FYI!
The mentioned punch is not actually a hallmark but a maker's mark! A hallmark is the official's punch(es). The goldsmith's/maker's punch is usually called maker's mark.