It's a very good fine, one of the early light weights. I have found a lot of producers made claims to their prodcuts that were only almost true. I think Elna had their
free arm straight stitch model officially introduced in 1940. Freia is the only bakelite vesion I know of, probably lighter than Elna 1? There is likely much better sources for info on a German vintage forum. They would know which bobbins ot takes, maybe a standard veritas type? I doubt this machine were exported in large numbers. Bernina's first
free arm zigzagger came in 1944 (some sources say 45). Favta had an early free arm model called
"Darling", a smaller size light weight, but I have not found any date of introduction. It came in various version know as "Cresta" or "Vigorelli" (a zigzagger version from the 50s). Singer introduced their
320 (320K) in around 1958, a free arm zigzagger.
Edit; I found
a picture on the web, the bobbins look small and flat, a bit unusual.