DISRAELI DOCUMENTS
This advert for Tommaso Nieddu's Cervino derailleur was placed in the same edition of Route et Piste as an advert, placed by his brother Amadeo Nieddu, for Vittoria derailleurs. Nieddu family Christmas dinners must have been tense occasions.
This advert claims that the Cervino derailleur was already winning races in 1947.
(Source gallica.bnf.fr/ Bibliothèque nationale de France)