Do you mean this photo?
http://www.messerschmitt-bf109.de/pi...030-swfoto.jpg
As far as I know that is a G-10 model and the rear fuselage is painted all-over brown 81. Nose is 75/82 with 76. Or that's how it's usually portrayed...
PS. What happened to the JG 300 website?
PPS. Have a look at
http://www.messerschmitt-bf109.de for some more paintscheme ideas. Great collection of 109 photos. Here's another odd G-10:
http://www.messerschmitt-bf109.de/pi...024-swfoto.jpg. The G-14/AS gallery isn't too big, unfortunately.