Maybe it is English. They like the carriage feed wheel on the right side of the apron. And it will cut 12 threads per inch, but not 13. In the USA, very common 1/2 inch UNC threads are 13 TPI, but 1/2 inch Whitworth threads are 12 TPI.
Look at some of the nuts and bolts to see if they are metric or English (BSW or BSF).
In 1969, I bought a new Volvo 164 car and was surprised to see it had mostly American UNC threads on the fasteners in the Swedish parts, but the German-made components (brakes and steering) had metric fasteners. Don't know about old Swedish machine tools.
Larry