The years listed for the Stronglight/Spidel D6 Extra Leger headset on Velobase are 1977 to 1980 based on its appearance in Stronglight catalogues and product literature. Would anyone be willing to post/share copies of the headset page(s) from the Stronglight 1977 catalog? I cannot find this catalog on the web. I am looking for verification as I choose a headset for a Peugeot PY10 build. Yes, I know that the Stronglight S5 headset was 'standard' for the PY10 in 1977, but was the D6 also available as an upgrade option? Thank you.