I am the happy owner of a S.C.O. "Verdensmestercyklen" Model Professionel from 1969. It has double butted Reynolds 531 tubes all over, Nervex "muffer" (don't know the English word) and it weighs app. 10 kilo's. The bike has som stylistic elements dating back to the 50'es and before, and it's excactly the same model that Jørgen Schmidt rode, when he won the amateures world championship road race in Leicester 1970. The term "Verdensmestercyklen" actually derives from the marque Harthiner that S.C.O. bought around 1960. Harthiner had won the WC in 1921, 1931 and last 1949, and they were happy to state that on every bicycle the sold, stretching from sporty everyday bikes to plane racers. S.C.O. took over the bold definition "Verdensmestercyklen". And the the racing cycle program that S.C.O. had in the 1960'es and beyond were originally almost entirely taken over from the Harthiner bikes. But as the S.C.O. cycles also won world championships, they sort of earned the title by their own merits. :-)