Since S&W guns were not marked as to manufacture date, I suspect you are looking at a patent date. We would need more information to properly ID your gun and answer your question.
Need a detailed description of ALL markings.
No such model number.
50-600 usd
100-450 USD
100-500 USD
400 or so
1948
r60-400 USd
50-500 usd
50-250 usd
WHATEVER SOME BUYS IT FOR
The value of a Smith and Wesson Model 51 22 Magnum Revolver would actually depend on a number of factors. Some of these factors would include the age and condition of the Revolver.