By researching the danish makers marks I found out, that a lot of masters used three letters in the makers mark when the family name is a compound word ( for example Hieronimus Svaerdfeger “HGF” or Ditlev Brasenhauer “DBH”).
But when the thirt letter in the makers mark is an “S”, it stands often for the familar name addendum “-sen” (for example Johan Pedersen “IPS”, Christian Jensen “CIS”).
The third letter of the makers mark on this spoon is not clear but it is very probably a “S”.
As shown this “S” is not necessarily the first letter of the familar name.
So I ask myself if the “CLS” mark could be another mark of Carsten Lauridsen from Copenhagen? He has made identic spoons also without city marks.
Kind regards, Ringo