https://www.pipeburn.com/home/2017/0...e-austria.html
My grand dad Leopold had one but the Nazi'z stole it off him as he was Jewish in 1938
he used to race it in Austrian TT and ice races withe the chair on over the alps in winter ,,its a 800cc V4 my mum used to be the sidecar ballast for the alps races she was 12 in 1938 ,,, when the Nazis confiscated the bike he joined a resistance unit , but managed to get my mum out late 1938 to UK on a Kinder transport ,,,, he and my grandma and cousin Kieth came out in August 1939 ,, Keith later became a SAS special forces commando as a German speaker they were sent in behind the lines in SS uniforms to commit sabotage and create confusion in Europe and Balkans ..