Unknown mark on Swedish pin ? SDN is it makers mark ?

[rob h]

The pin is marked with 3 crowns for sweden, and an S in a cartouche for silver. It is also stamped SDN. Is this a makers mark or also for sweden ? All help is appreciated.

Thanks

[Tosten]

Hello
I suppose it is Sven Danielson working in E. Lindroths Eftf. in Motala, Sweden
Regards Tosten

[JAKJO]

The maker' s mark SDn was registered as Linderoths Eftr (successor) Sven Danielson 1931-1956, Hovjuvelerare (court jeweler) Sven Danielson AB 1956-1966 and Sven Danielson AB, Repslagaregatan 11, Motala 1966-1988.

The mark of origin (town mark. a script "M" in a square, Motala) and the date letter are missing. It is 830/1000 silver.

Hope this helps!

Best regards/
JAKJO