DISRAELI GEARS
This page lists the derailleurs in this collection, sorted by brand, with names starting with characters from '0' to '9' and from 'A' to 'R'...
Where you see a red link, this is for a derailleur model dating from 1950 or before, which I do not (yet?) have in my collection - but for which I do have some kind of real and relevant documentation.