Integrale Warszawa, Skraba ST.3 aircraft, Salmson 9AD engine

Nice INTEGRALE propeller picture, manufacturer’s and Tonkilaque decals visible. Photo from the collection of Michał Krawczyk, Warsaw, many thanks!

 According to Mr. Michał Krawczyk, the man at front of the aircraft is Mr. E Piorunkiewicz, foreman of Centralne Warsztaty Lotnicze and a friend of Bolesław Skraba.