There is a thread on "olympia Sport" being a house brand in NL, but unfortunately the current glitch won't let me view it.
What I could pull off google
Olympia Sport was the house brand of Rein Ruitenbeek's bike shop in Hilversum: As far as I know Ruitenbeek didn't build the frames and never ...
https://www.bikeforums.net/classic-v...pia-sport.html