Hi, all. Not to add fuel to the fire, but if not already mentioned, as far as authoritative sources: I have in front of me the NRA's "The Basics of Pistol Shooting," copyright 1991, that was given to me by an NRA instructor several months ago. There is a section that describes different cartridges which says, on page 13: ".38 Special--Introduced by Smith & Wesson about 1902." So I guess that they used the word "about" to provide some wiggle room. However, on S&W's web site, they have the following text regarding the Model 10: "The .38 S&W Special +P and the revolver to fire it was first introduced by Smith & Wesson in 1899. It has become one of the most recognized handgun/caliber combinations in the world." So I guess the authoritative answer is "1899," or "about 1902." But then again...