"Charles Burki was born in 1909 in Indonesia (a "Nederlands Indie"). From a very young age he combined excellent skills as an illustrator with a strong preference for technical subjects. When he settled in Holland in the middle of the 1930s, motorcycles were his favorite subject. He made many illustrations for the Dutch motorcycle magazine "Motor", like the one below (that must be a Norton M20 and a translation is not required!).
It will not come as a surprise that he spent his earnings on fast motorcycles and in 1935 he bought an M30 International. Used solo for two years it was then hitched to a Steib sidecar; that's his wife Sophia in the chair.
The drawings below were made in the Fukuoka 14 prison camp in Nagasaki on pieces of scrap paper that he had found. Obviously, they were made from memory [POW artwork and writing have been collected in exhibitions and books such as 'Flywheel' - pd'o].