Analysis of information sources in references of the Wikipedia article "List of revolvers" in English language version.
Introduced in 2005, the 460XVR (Extreme Velocity Revolver) is built on the same massive five-shot, double action X-frame that houses the S&W 500 Magnum.
The ZKR-551 was manufactured by Zbrojovka Brno. From 1957 until 1971, about 2500 of these guns were made, chambered in 7.62 Nagant, .22 LR, .32 S&W Long (a popular UIT/ISSF competition chambering) and by far the most used in competition, .38 Special. A further run of 300 pieces was made during Zbrojovka Brno's second incorporation in the 1990's-2006. They were a success in the UIT competitive setting, helping Czechoslovakian shooters win and place well.
