DISRAELI DOCUMENTS
This is one of the earliest adverts I have recording Fausto Coppi using a Simplex Tour de France derailleur (in this case to win the Milan-San Remo). Famously, the humiliation of Coppi defecting to a French brand drove Tullio Campagnolo to develop the Campagnolo Gran Sport.
(Source gallica.bnf.fr/ Bibliothèque nationale de France)