I believe there were at least three different GS chainrings, a 3-arm as found on the Raleigh Competition GS, a 5-arm 144 which was a slightly less polished version of the NR, and a 5-arm 116 like Victory and Triomphe. The original Campy 5-arm 151 may also have been called Grand Sport at some point - not sure about that one.
Regards,
Jerry Moos
Houston, TX
> I too had a set of GS stamped cranks that were dated for 1980 (and they
> came on a "1979" bike). I never checked the BCD, but I assumed they were
> 144. Definitely on list.