The Model 1900s were initially fitted with distinctive "high" spur hammers until approximately serial 2400 when "stub" rounded hammers also began to appear, to avoid pinching of the web of the thumb and snagging on clothing while drawing. As approximately 1,450 of the M1900 "high" hammers were left over when the M1900 merged into the M1902 sporting model, (the 1902 sporting model being a continuation with some internal modifications of the M1900) starting at serial 4275, it might be surmised that perhaps approximately 3,000 "high" hammer (mostly early) and about 1274 "stub" hammer M1900s were produced. Stub hammers may also possibly show up in some retrofitted earlier pistols. Numbers at this time can only be considered approximate. Collectors need to continue to post and communicate observations of surviving pistols.