Hallo guys, I have a bit weird question, but I'll explain that. There is a very famous picture of a Hurricane Mk.I and its TR9 being adjusted. It was taken by F/Lt Stanley Devon, an official photographer, on his visit at Exeter AF in November 1940. http://www.iwm.org.uk/collections/item/object/205209989 Obviously on the same visit F/Lt Stanley Devon took another shot of 601 Squadron Hurricane. It depicts a Mk.I, s/n P3886. http://www.iwm.org.uk/collections/item/object/205194292 Ok, no wonder