Yes you are quite correct. If you look at Chuck's Campy Timeline
http://www.velo-retro.com/tline.html you will see that it was first
introduced in catalogue 16 Supplement in 1971.
Hilary Stone
Charlie Young wrote:
> I thought that the 3 arm steel Gran Sport crankset was introduced later than
> the 1950's. Can anybody shed some light on this?
>
> http://ebay.com/<blah>