Thank you for your prompt reply. I already have the books you mention, but they cover a later period than my enquiry. The period that I am seeking was immediately post war. The Groups that were chosen to remain in Germany and perform occupation duty continued to use their wartime markings, with the addition of red-yellow-red bands around the rear fuselage. This lasted, I believe, until about August 1946, when the groups were re-numbered and a new system of coding was introduced. This is the period that I am interested in. I found the attached picture on the internet, unfortunately I forgot to take a note of where.