This rather nasty catalogue was published as a single, large, double-sided poster. This particular example has been folded and unfolded many times.
The poster was made up of 16 panels. Panel 16 shows some historical material from 1928-1935. Unfortunately it is so poorly printed that it is less useful than it might be.
Despite all these criticisms, the range of different options available for each model is shown better in this document than in many flashier Simplex catalogues.
Browse associated derailleurs.
Simplex SJ810 GT 1975?