We found the maker! You see, your text on page 71 says “Silverspoon (crowned) …….:Marked with Skien’s town mark (192) and the unknown maker’s mark R (195), length 11.5 blade 5,4 cm...” More or less the same information is found in my much newer book than yours and, in addition, the name Rasmus S…? and my earlier mentioned (working) years (Norsk Sølv Gullsmeder gjennom 600 år. Author Jorun Fossberg 2003.
![Image](https://i.postimg.cc/QMw7p4vx/Rasmus-R.jpg)
Looking again on the town mark on your spoon reveals that it is actually not the letter “F” but “S”.
![Image](https://i.postimg.cc/DyvSb3mP/Rasmus-S.jpg)
Congratulations, you have a nice old Norwegian spoon.