Gian Robert
Gian Robert was a manufacturer mid to moderate range parts.
They seem to have disappeared from the market by the early 1980s.
Updated 4/20/2003                     Click on images to see larger version

Gian Robert range of derailleurs
as illustrated in the 1981 Ron Kitching catalog..

Two variations of the rear derailleurs
The first appears much more crude in execution that the
latter. No manufacture dates are known for these...

Rear derailleur and shifters
Photos courtesy Byron Morton

       

Nylon (plastic) rear & shift levers..

Derailleur set