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wonderful subject for a thread
there is a very natural tendency to think of all cinque vis sets as having the 50.4mm BCD
at least one doth not, the Zeus Competition whose BCD is something about 55.2mm
it is even listed in the Howard Sutherland manuals as 50.4mm
production ceased in 1971
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the Peyrard set in non-fixie's final image is second generation which launched in 1976
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