I finally managed to find my Ferris/Beardicon production alterations book and noted on p.26 that the split sight base was discontinued in October 1907. So, since the barrel is 10-08 dated, then I'm assuming that it was correctly assembled with a solid sight base. On the same page, the rear stock bolt was authorized on February 20, 1908. So the CN 1908 inspected stock with a single cross bolt is highly possible. But, the stock itself was originally cut/manufactured on the stock lathe for the pre-1906 cartridge due to the plugged front band screw hole (no rod bayonet insert) with S stamp and originally routed for the split rear sight base. The receiver date is 1907. What the heck is going on here? Did it come out of Rock Island as it sits? Did it get an early rebuild? I'm solidly confused now.