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puller thead -
IIRC Verot launched the TS model (Touring Sport) around 1974
1977 was their big revision of the chainset lineup where model 93 was eliminated, model 99 was revised and models 104 and 105 were created
it is quite possible that the revisions of 1977 included a change in the removal threads for the model TS
if this is the case one would need to know whether a particular set is "early" or "late"
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