Hello! It's not Danish, it's Austro-Hungarian tax-free mark used in 1809-1839. Source: Karl Knies "Die punzerung in Oesterreich", Wien, 1896. Best regards1 Alex.
I thank you for you comments and help. Indeet I think the most similarities in form and decoration to this spoon to my knowledge are to find in Denmark.
Could the initials (with the two dots between the letters) help to localice the origin? Was this kind of monogram common in Denmark or Scandinavia?
the initials could very well be Scandinavian. Normalle you expect ??D or ??S for name + fathers name & Daughter (datter, dotters) or name + fathers name & Son (sen, son, søn)
But its not alwayes S and D in case whelthy persons it could be different. The S D would be custom among farmers, craftsmen etc.