DescriptionChalenge1930.jpg The aircraft before the en:Challenge 1930 contest, in Zeppelin hangar at Berlin-Staaken. From the top: SP-ADD - PWS-52 (Poland
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)