Model numbers did not come into use until the mid 50's. Standard Catalog of Smith and Wesson by Supica and Nahas is the reference you need.
No such model number.
No such model number.
No such model number.
No such model number
Call S&W and they will tell you when it left the factory. It could have been made anywhere from a week to a year before.
Smith&Wesson model 14
No such model number.
No such model number
With the serial number that you have supplied,your Smith and Wesson model 15 was made in the year 1950.
Your serial number indicates that your Smith and Wesson model 18 was made in the year 1962.
Your serial number indicates that your Smith and Wesson model 59 was made in the year 1975.
Impossible to tell model number by just the serial number.