This is Finnish made telephone, Puhelinliike Arsa in Salo. Founded 1943 and was first making telephones and switchboards. Soon changed to make electrical centers and their cases, which their still are producing.
Cabinet of phone made by local cabinetmakers from birch, stained and French polished. Parst are bought from Siemens like handsets and generator. The phone has no bells, but instead a butzer !
This one seems to be made 27.4.1950.