IMO it is as much art as science. There are so many variables. Assembled or disassembled, the packing, the temp and duration of the soak, the quench and orientation when it hits the quench. I thought I had read that the floor plate line has to do with cooling rates of thicker vs. thinner metal in the quench along with all the other variables that make up Parker's process, but I could be wrong. All I know for sure is that not too many people can consistently and correctly reproduce this particular tell tale of original Parker colors today.
Oh, and it is a beautiful gun. Congratulations!
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