pickax, thanks for the info. I'm by no means an expert on the M1917 and was not aware that production went past Feb 1919. And yes it is interesting because in the, albeit limited, research I have done I have not found any serial numbers even approaching 680XXX. So my rifle was I'm sure now a 1919 build. How far into 1919 I don't know. And with the mixed parts I'm assuming it left the factory as just a receiver or possibly a barreled receiver. With the serial
being that high I'm also assuming it must have been among the very last ones made.