...and here is my mid-60s Champion du Monde frame...how do I know its a CdM you ask...it has the Number 100 designation on fork blade which was the number Gitane used to designate the CdM. I date to 66 or maybe 67; 531, Nervex Pros, Campy dropouts, and same seat stay finish as bike in question (pre-Carre willow-leaf) BUT no pump peg braze-ons and with foil decals. Euro-spec model with no chrome like team bikes too.