I have taken a new set of photos of my c. 1980 Gilles Berthoud including some close-ups of the Ideale 90CR (honest, that's the model no.!) titanium undercarriage saddle as well as the Mark II Huret Jubilee derailleur with drilled cage which have recently been very much "on topic" around here.
http://www.wooljersey.com/
or
Peter Kohler
Washington DC USA