I don't know--I'd be willing to say purebred but not well-bred on this one. I've seen alot of longish-nosed boxers out there that were purebred but not the best example of the breed. It looks like she has a shortish muzzle, and probably has an underbite. The plane of the muzzle as compared to that of the forehead doesn't seem to look too far off an American style boxer head. If you look at her face from straight on, she does have that "square muzzle on a square head" look about her. She doesn't have any sign of a black mask though.