Compare the sides of the Parker boat to the D&H drag flat. The D&H is slab sided, and the Parker boat is anything but slab sided. The bottom of the D&H is very very very unqiue as well. One of the earliest "runner" type bottoms plus a step midship. I have seen a couple D&H in my life, and the boat at Parker IS NOT a D&H.

This is a pic of the sister ship to the Mixed Emotions boat, and by far the most famous of the D&H boats.