Does anyone have a French bike built with the French metric version of the late 1970s Reynolds 531 "SL" (Special Lightweight) tubing?
... This was called "Extra Leger" on French tube set decals.

This came out around the same time as Reynolds 753 tubing (1977).
Just curious because I'm not familiar with any French bikes which used this tubing.
Seatpost size would be 27.0 mm. with a seat tube outer diameter of 28.0.

This is what both the British and the French decals looked like: