sentences:  The 1902 Military Model, started production with "stub" hammers only.The third hammer, which did not see use until late 1907 or early 1908,was a lower profile spur hammer and replaced the stub hammer only in the very last of the sporting models but took position as the sole 1902 Military model hammer from about 1908-09, just prior to that being phased into production alongside the stub hammers.Due to hand polishing of Colt Automatics through the 1905 Model .45, the depth of any pistol's markings might vary on the same pistol as well as the weight; pistols might vary as much as an ounce when compared.