DISRAELI DOCUMENTS
This advert is interesting for what it does not show. A September edition of L'Officiel A.C.M. had featured, at some length, a new derailleur produced by Radios, called the Radios-Vario. But it is conspicuously not mentioned in this advert - or indeed in any subsequent Radios adverts. An early example of vapourware?
(Source gallica.bnf.fr/ Bibliothèque nationale de France)