Your serial number indicates that your Smith and Wesson model 59 was made in the year 1975.
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 Smith and Wesson model 19 was made in the year 1978 by the serial number that you have supplied.
Your serial number dates your Smith and Wesson model 59 to the years 1977-1978.
Smith&Wesson model 14
No way to tell model number from just the serial number.
Your serial number indicates that your Smith and Wesson model 39-2 was made in the year 1976.
With the serial number that you have provided,your Smith and Wesson model 14-4 was made in the year 1977.
With the serial number that you have provided,your Smith and Wesson model 39-2 was made in 1976-1977.
You can not tell the model number with just the serial number.
You will need to add the model of Smith and Wesson to your serial number to get the correct year of manufacture.