Peter Kohler added:
I have an Ideale 90 with titanium undercarriage on my Gilles Berthoud. It most certainly is well within the CR timeframe, Peugeot lists it as an option for the PY-10CP in their 1979 catalogue and I suspect it probably was introduced c. 1977.
Peter and Jerry,
I remember seeing ads in LeCycle in the early '80s for Ti-railed models. They predated those Columbia shuttle models by quite a few years. I could probably track down a date and issue for you if I had a full-time CR stuff secretary.
"not enough hours..."
Ken Wehrenberg, Hermann, MO