DescriptionChallenge1930 C193, PWS51.jpg	The aircraft Caudron C.193 (F-AJSH, pilot Francois Arrachart) and PWS-51 (SP-ADC, pilot Józef Lewoniewski) before en:Challenge 1930 contest (cropped photo Chalenge1930.jpg)
Date	July 1930
Source	Marian Romeyko (editor): Polska lotnicza, Warsaw 1937.
Author	Polish photographer
Other versions

This photograph is in the public domain because according to the Art. 3 of copyright law of March 29, 1926 of the Republic of Poland and Art. 2 of copyright law of July 10, 1952 of the People's Republic of Poland, all photographs by Polish photographers (or published for the first time in Poland or simultaneously in Poland and abroad) published without a clear copyright notice before the law was changed on May 23, 1994 are assumed to be in the public domain in Poland. To uploader: Please provide where and when the image was first published.

This image is a derivative work of the following images:

• File:Chalenge1930.jpg licensed with PD-Polish
  • 2007-05-03T15:17:42Z Liftarn 650x1084 (156753 Bytes) {{Information |Description=The aircraft before the [[:en:Challenge 1930]] contest. From the top: *SP-ADD - PWS-52 (Poland, pilot Franciszek Rutkowski, not classified) *OO-AKY - St. Hubert G1 (Belgium, in the French team, pi

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