uncle Alan said:
Until Colt managed to fill orders for the semi & because they were ONLY tooled up for the semi,S&W made them as a stop-gap.
Safe Shooting !
Uncle [ old goat ] Alan
"Colt Revolver, Caliber .45, M1917. Official designation Colt service model 1917 .45 ACP Military use: Used as a substitute-standard sidearm by the United States and Great Britain.
The British model .455 caliber revolver is identical with the U.S. Model 1917 except for the cartridge used."
"Initially adopted to replace the .38 caliber revolvers around 1910 as the .38 was a failure in stopping muslim Moro tribesmen in the Philippines, and called the model of 1909, but was only a stop gap measure as we adopted the model 1911 .45 auto.
During WWI the great expansion, blah, blah, resulted in severe shortages of small arms. England ordered Colt New Service revolvers in .455 Webley.
When the U.S. Entered the war in 1917 production or automatic pistols could not be increased rapidly enough to supply immediate pistol requirements.
It was decided to order Colt and Smith & Wesson .45 caliber revolvers, already in production for commercial sale, as substitute-standard handguns.
This revolver was placed in to production in November, 1917 as the Colt revolver, Cal .45, 1917...................With the end of the war in 1918, military production was canceled. A total of 151,700 U.S. Colt model 1917 revolvers had been manufactured.
During WWII the reserve stocks of M1917 revolvers were again issued for emergency use. British and American forces used them to supplement their standard sidearms.
After the end of WWII, the model 1917 was withdrawn from all service, except in military police units where it was considered suitable for use in their types of duties."
The above was taken from International Armament First Edition, by George B. Johnson and Hans Bert Lockhoven.
Just one of many publications on this subject.