Peter asked about the following parts:
> GB 66 brakes
The last appearance of the GB 66 brakes in the Holdsworth Aids catalog is in 1967/68
> Williams AB77 chainset
>
> GB 88 brakes (which I've never seen except on Pete Paine's website)
>
> GB spearpoint hinduminium stem with the drilling for centre pull brake
> Airlite low-flange hubs with quick release"
All of these are still listed in the 1969/70 Holdsworth Aids catalog, but not in the 1975 catalog. Sorry I don't have any in between to get the year Holdsworth Aids stopped offering them.
> Barelli pedals
I didn't find these in any Holdsworth Aids catalog (although I didn't look at all of them), but they offered Constrictors until at least 1965.
> When were these essentially out of production or general use? Late
> 1960s? Early 1970s? Could you still reasonably build up an "All British"
> component list with the exception of derailleurs as late as say 1972? Or had John
> Bull long made way for Sig. Campy e Cinelli by then?
I'm guessing that by '72 an all-British full-on racing bike would have seemed a little old school, but I would certainly put one together.
Dave Ross
Portola Valley, CA