Impossible to answer without a serial number; 10-500 USD
You will have to get it lettered by S&W to find out.
A fine revolver.
Impossible to age without a sn. value range from 10-500 USD
You can get a historical letter from S&W for 50 USD.
The "J" frame is the Smith & Wesson small frame revolver such as the model 36 .38 special. The smallest frame, as in the model 36 Chief's Special.
100-500 USD or so
Need the sn to answer
A K frame revolver
50-450 USd
100-450 USD
50-400 usd
100-450 USD