The website fokkerdvii.com holds this picture. It shows a monocolored machine with a blemish, quite similar to the well known 425-477-pictures.
http://fokkerdvii.com/pics/rudder-markings/477a.jpg
It seems that there are more sharp pictures where taken and also nearer to the aircraft as commonly know from the sources. What a pity that the Mil.Nr. is not readable...
H.
(By the way, I also think that the pics all shows 477/17. It's the easiest and best explanation)