S&W cataloged that gun up to the end of WWII, but I doubt any were actually made after the war began. After WWI, the commercial model was sold along with other S&W guns, so it could have been just about anywhere, in any use - civilian, military, police. 23000 in the U.S. military model would have been shipped to the Army, but the civilian model was numbered in a new series from the military gun. The most obvious difference is that the civilian guns had checkered stocks with medallions, where the military stocks were plain wood.
CAI does not import just ex-military guns, though that is the bulk of their business. They will buy any guns they can buy and sell legally, which would include civilian and police guns.
Jim