1950 is possible, but my list would indicate 1951 is more probable. I show several in the C150xxx to C152xxx range shipping in February, 1951.

And this isn't a Model 10. Those did not start shipping until 1958, and none of them had a five screw frame. The upper sideplate screw was eliminated in 1956. What you have is a .38 Military & Police revolver. In the days before 1958, S&W revolvers had model names only, not model numbers.

__________________
Jack
SWCA #2475, SWHF #318