Without a detailed description of all markings, features, caliber/gauge and type of action (SA, DA, BA), there is no way to answer.
15 yra
Email smith and Wesson for the answer
The Standard Catalog of Smith and Wesson, 3rd Edition by Supica and Nahas has serial number data that will assist you.
Need the serial number to answer the question.
1979
1976
1981
1973-74
No serial number provided. Serial # 426742
1948. Worth spending the $30 to get it lettered by Smith and Wesson, IMHO.
With the serial number that you have supplied,your Smith and Wesson model 15 was made in the year 1950.
Impossible to answer without a serial number.