A good era to do an all-French component fit methinks with the absolute top o the heap of Spidel, CLB etc. at their peak at this time.
But to the point, this would me my top pick of a French seat pin/pillar/post:
or
Saddle: get yourself an Ideale 90R titanium
Bottom bracket: Stronglight titanium
Throw all of this together and you've shaved off 3/4 lb or more off any comparable Eye-Tie component fit and then some. My 64 cm (c-t) 1982 Peugeot Pro-10 weighs but 20.5 lbs and that's not even with the titanium bb or saddle.
Peter Kohler
Washington DC USA