Norway spoon No3 - please help to identify the marks.

[Estrial]

Hello everybody.

I would be grateful for any kind of information about this collectors spoon.

Thank you in advance =)

[AG2012]

Hi,
It is Rjukan cable car, Norway, but not solid silver; number 40 indicates silver plate. Cannot help with the maker.
See here:
https://www.925-1000.com/a_platenumbers.html

Regards

[Traintime]

Marthinsen of Tonsberg here: https://www.925-1000.com/silverplate_M.html

[dognose]

As I understand it, the 'N' within a square was used between 1929 and 1932.

Trev.