Nice buckle, I have a HJ buckle with the same makers mark. It seems like most of these DAF buckles I see are fake. I do like the buckle that you have posted. Ian.
Nothing wrong with that buckle! It's a nice transitional example (I'm speaking here of the markings on the buckle). The colour of the buckle is how it should be. They were made this way. The gilt is NOT post-war and you shouldn't remove it! Looks great!