Google is your Friend, but sometimes you have grab it by the throat & shake it hard!!
Bonjour
Richard,
Following your very good but subtle clues; I now believe that your Challenge shows the Sk 10 Trainer version of the Raab-Katzenstein RK-26 Tigerschwalbe, originally designed by Gerhard Fieseler and built for the Swedish airforce, one was later donated to Finland for the "Winter War" campaign.
Sk10 RK-26 Tiger-Schwalbe
Just found your image here!
F19 in the Winter War
It's an early start this morning and a busy day ahead, so please declare Open House if you agree with my findings.
Last edited by SincoTC; 26th May 2010 at 06:34.