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
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