The company was founded in 1965 as a subsidiary of Klöckner-Werke AG in Montabaur, Germany.
Klöckner |
Approximately 23,000 RSO of all versions were produced by Steyr (2,600 pcs), Klöckner-Humboldt-Deutz AG (KHD; 12,500 pcs), Auto Union - Siegmar plant (former Wanderer; 5,600 pcs) and Gräf & Stift (4,500 pcs).
The Munsterschwarzach-Group (Godehard Joppich, Stefan Klockner et al.)(publishers of the Beiträge zur Gregorianik) have been issuing their own melodic restitutions, as has Anton Stingl, and Geert Maassen with his Fluxus.