Looks like a very nice specimen to me. The only question I have would be "ears" on the hammer. That style of hammer was used on the original 1911s. It could be that Colt was using up old stock.
Here is a picture of a Colt 1911A1 that was one of a batch of 800 shipped to Springfield Armory in January of 1944. It is all original in every respect, including the finish. The forward portion of the slide and the metal around the slide stop notch (other side) have been heat treated before Parkerizing, causing a difference in coloration. Note that the hammer is machined flat on the sides, which is more typical of most 1911A1s I've encountered. Also, the trigger on this one is the stamped variety, more common in the late portion of the war. As you may know, "GHD" are the initials of the inspector of the gun, Guy H. Drewry.
For more information on U.S. 1911s and 1911A1s, see my photo album on them here:
http://smith-wessonforum.com/members...5-pistols.html
John