Yes, the rudder is incorrect. That logo was never used on the Dr.I's. Taz has posted several photos of this before and Greg's new triplane book has all the detail on the markings you need. Also since this is 450/17 it would have had the later style markings with the green strip in the lower section of the rudder.
Close-up Photo from the Peter Grosz Collection.
Now the photo I have does show it all white so the green section must have been repaint along with the all cross changes.
Now I only have the vary low res photo of this so if someone has the high res of 450/17 can you let me know.