In my 3rd and 4th picture, notice the little cutouts in the wood. At first, I thought that was a chip missing but after receiving the gun and closer inspection, I noticed it is required from the factory for the forearm to fit. This is the same as the solid frame 1899H located in David's book.

"...aspire to live quietly, and to mind your own affairs, and to work with your hands, as we instructed you, so that you may walk properly before outsiders and be dependent on no one." - Paul to the church in Thessalonica.