The Model 15 was chambered in 38 Special, not 22 LR. The only models with an M prefix sn in 22 LR were the 34,35,43.51,63. Value range 75-400. The sn you list is from @ 1981
Impossible to answer without knowing the caliber.
It should be marked on the barrel.
Not enough details to answer.
The Standard Catalog of Smith and Wesson, 3rd ed, by Supica and Nahas.
Your Description and serial number indicate that you have a Smith and Wesson model 30,or 31 which was made between 1961-1970.
The Standard Catalog of Smith and Wesson, 3rd edition, by Supica and Nahas.
Need to know the caliber in order to answer.
Need to know the caliber in order to answer.
Need to know the caliber in order to answer.
Need to know the caliber in order to answer.
Call S&W with the serial number.
Impossible to answer without knowing what caliber it it.