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Dear PX10 threaders, I think that we are approaching the right moment to turn our attention to the D/T shift levers on PX10's. As far as I can see from photos, the late 60's PX10's had the same levers as those used in the early-mid 70's. Is this correct? I think that the earlier chrome clamp band had a dome where the simplex logo is (at the top of the clamp band, between the levers). The later style had two points and the letter "S" in the centre of a star shaped circle.
Well, of course, it's more complicated that this!
I don't have the stamina to take this back further than c. 1968. But to a add to the above, there was an odd c. 1969 variation that looked rather like a Huret lever. And remember, too, that the Simplex logo on the black plastic "paddle" lever covers changed from the winged logo c. 1967-70 to the encircled "S". There was also an intermediate shifter band c. 1971-73 that was sans "button" in the middle.
If this keeps up (as I hope it does!) I am going to cut and paste all of these insightful postings and do a database for my PX-10 Yahoo Group!
Some additional data points
Rear derailleurs:
1967: black face plate. For some reason these are very common.. I have like three of them via French eBay 1968: I believe the same as above 1969: blue face plate. And as rare as the 1967s are common. Yet 1969 PX-10s are actually not rare
Livery
The white/black scheme was phased in the for the 1963 season. So that for the Tour of Belgium that year Pino Cerami was still riding his blue/yellow PX-10 when most of his teamates had the new colours.
Bar tape for the team during this time was white with a single width of red at the ends. The Mafac brake levers also were three-quarters taped around the half-hoods. Stock PX-10s for the public had all white tape up to c. 1971 when it changed to black.
Masi "PX-10s" for Simpson/Merckx, 1967
These appear to had all stock Peugeot PX-10 components but one of Merckx's at least (and there is evidence each rider had more than one of these machines that season) has Universal brake levers. Lugs (Bocama?) were plain and painted white. Merckx rode a stock PX-10 for the Paris-Rooubaix that year and it, too, had Universal brake levers. Pingeon won that year's TdF on what appears to be a 100 per cent stock PX-10.
Peter Kohler
Washington DC USA