The S.33 was a successful early airliner. It is classed as a 'berline' (enclosed carriage) here on the rudder, but in addition to four in the forward cabin, one passenger sometimes sat to the right of the pilot. The main route of Compagnie Messageries Aériennes (CMA) was Le Bourget to Croydon. This aircraft was painted orange according to artwork. Photo from: Bibliothèque nationale de France - Gallica