Here is the original of that revolver, the S&W Model 1950, 45 ACP, Target Revolver.
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This was the first Target Model S&W put into production in 45 ACP. Prior to this Model if a shooter wanted an ACP target revolver it was a custom built revolver either from S&W or a gunsmith.
It would have made the ideal revolver for LE if produced in with a 4” barrel but only a very few were made. When I wanted one, I had to build my own. S&W eventually got around to offering it in stainless as the 45 ACP Mountain Gun. Here is an image of my Foothill Revolver and the Mountain Gun.
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They are both round buts, I made a pair of RB/SB stocks for them to see which I preferred.
Kevin