The first S.33, prototype of a successful but sporty-looking airliner lineage, clearly from the SPAD stable. Might this location be Suresnes, near Paris? Photo from: ETH-Bibliothek Zürich

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

Smart biplane airliner of CIDNA. The company operated Vienna - Warsaw as a branch of its Paris - Istanbul route. Photo from: Narodowe Archiwum Cyfrowe

The Blériot-SPAD S.33 was an elegant biplane airliner seating four passengers in the forward cabin and sometimes a fifth next to the pilot. The improved S.46 had the Salmson 9 radial replaced by a more powerful Lorraine 12D inline engine. CFRNA acquired a large fleet of 38 S.46s. From 1925, its successor CIDNA had the surviving 34 aircraft refined to S.66 standard. Photo from: ETH-Bibliothek Zürich