That's just a post-war one. Rheinmetall typewriter factory was situated in Sömmerda, Thuringia (so far from Rhein), this way it become a soviet-owned company after 1945 and before it was returned to newly created GDR. A lot of these machines were produced to be supplied to USSR as kind of reparations payments. The layout also proves this. Here's an experimental "ЭУКЕН" layout, one of transitional variants on the way to modern "ЙЦУКЕН" (since 1953). While all the pre-war typewriters were built with 1918 layout "Й1УКЕН"