Here is a post-war signed photograph of Karl Maria Demelhuber wearing the army style white tunic during the war.
Thank you very much to for these fascinating pictures and information regarding of the white style tunic. It seems that the wear of the white tunic during the second world war was more common than I first considered, especially for the Heer and even in the Waffen-SS, and the shots of Bittrich are wonderful!
I can honestly say that I did not expect so much interest in this topic, and as such, I have collated several photographs of white uniforms of the Third Reich and have posted several of them below along with sources:
Axis History Forum • White Uniform Of The Third Reich. Pictures And Information
Axis History Factbook: White summer tunics
Greetings. A brief note for those interested. A summer SS tunic is available for sale on Bill Shea's site. This pics are very interesting and a fascinating story attached. Regards, Paul
Here is a photo of Karl Koch a commandant of Buchenwald. Thanks to d'alquen for sharing his observations about the style choices of these men.