Colt double action revolver production was on life support for quite some time before the Python was put to sleep in 2005. But who was the major manufacturer of DA revolvers from approximately 1900 to 1960 when the revolver was king in the police and civilian marketplace?
A quick look at police equipment for the first four decades of the 20th century will show you that Colt DA revolvers dominated. A direct result of the S&W "Victory" model production for the British and American civilian and military was establishment of Smith and Wesson as a quality producer of revolvers, and they dominated in the post WWII police equipment market until the changeover to semiauto pistols.