Learning how to post and reply, so I'm replying.

I have a Mercier 300 that I bought while working in a bike shop (Ann Arbor, MI) in 1973. So my bike is 50 years old. Not much original, basically cranks (Stronglight), pedals (Lyotard platforms), and um, that's about it. Wheels, handlebars (the original broke off one half while I was streaking (not naked) down a Seattle hill), bottom bracket (since mid XXs, Phil Wood), brakes (I subbed Weinmann 500s for the orig Mafacs because noise), rear derailleur is Campy Nuovo Record, etc. Also, several paint jobs since (I used to be a professional spray guy). I love the original decal set-up - so very French (my late mother is French, so there).

I rode that bike from San Diego to Ann Arbor (MI) in 1974, on heavy duty sew-ups (tubulars, as we called them then). Many miles before and after that trip.

I'm still riding that bike, or rather, I'm riding it again after about 8 years break. I got the bike tuned to perfection, my legs and heart not so much.
Hope to hear from y'all.