sentences:  Use of the stub hammers ended approximately in late 1907, and there was a phasing in of lower spur hammers by until around 33000 where the spur hammers take over completely.The front checkered slides reputedly end around serial 11000 in 1906, where the slides then featured the more familiar vertical cut serrations on the rear of the slide.This leads to a deduction that the 1902 Military's with front checkered slides were produced 1902–1906 and numbered about 4,000, all with stub hammers; 1902 military's with rear cut serrations and stub hammers were produced 1906-1908ish and numbered approximately 2,000 (guesstimate); and rear cut serrations and low spur hammers being manufactured starting in 1907 number about between perhaps 11,000–12,000.