Thank you for your reply hanshauprich.
Interesting but I can see something like a color band on the fuselage just behind the man on the right of the one who wear the 20 mm belt.
I don't know if it is really a color band or just part of the camo.
It looks a little like at this from the JG6 ( D-9 version) , you are right...
I though JG6 had red and white fuselage band but who knows ?
There is no marks like numbers too, was it often?