No way to answer without the serial number.
c.1956
1977-78.
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.
Made in 1970
@ 1975
1977-1978. sales@countrygunsmith.net
32-33 years old.
45 yrs old
@ 31 years old
If the serial number is J75635 then your Smith and Wesson model 36,J frame revolver was made between 1979-1980.
The model 53 was made from 1961 and ceased production in 1974!
Your Smith and Wesson revolver was made in the year 1985.The value will be between 375-600 dollars depending on overall condition of your revolver and a good bore.