Very Early 1940's Fernsig Explosion Proof Telephone

This is an early example of an explosion proof telephone made by Fernsig a pioneer in the field. The phone has two lines available 'Kapitan' and 'Maschine'--this is all you need. Piece is from around the early 40's. Dial is a little loose and mechanism might need some servicing--a very attractive example of early industrial design.