I do have one frame of reference on the Mafac Racer/Competition dates. My 1972 PX-10 has Racers, while my circa 1975 PX-10 has Competitions, both sets of which I believe to be original. I think the Competitions are fairly early ones as they have "Competition" engraved into the calipers, not printed on a foil sticker as was done later. This would indicate the Competitions were introduced in the early 70's. This is reinforced by the fact that the 1974 catalog, the first in Chuck's Peugeot catalog collection, shows Racers on the model just below the PX-10 E, "Racer Professionals" (not sure what the difference was) on the PX-10 E itself, but Competitions on the PX-10 LE, which appears to have been the top model that year, so the Competitions were on the market in 1974. Of course the French manufacturers, even more than the Europeans in general, tended to use up existing inventory and to switch components when supply was tight, so the fact a particular PX-10 in 1972 came with Racers wouldn't rule out that the Competitions might have been on the market that early.
Russ Fitzgerald wrote:
> Now, my observation - I don't recall seeing the Competition on anything
> prior to 1970, and it may be later than that. I await Jerry Moos and Chuck
> Schmidt's comments. I guess Mafac lasted into the 80s, 'cause the Mafac LS
> sidepull came stock on certain Peugeots of those years.