1950
According to Smith and Wesson this gun was made in 1969 and is an early N series.
What serial?
The Smith & Wesson Model 29-2 with serial number N64291 was manufactured in 1979. The "N" prefix in the serial number indicates it is part of the "N" series, which was produced from 1977 to 1982.
I cannot assign a year of manufacture without you providing a serial number to your Smith and Wesson model 28.
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.
Smith&Wesson model 14
The Smith and Wesson model 19-5 was made from 1982-1985.
The Smith and Wesson model K14-3 was produced from 1947-1982. You would need to write into Smith and Wesson with the model and serial number. They can pull the date and send it back to you.
Your serial number dates your Smith and Wesson model 59 to the years 1977-1978.
Your Smith and Wesson model 19 was made in the year 1978 by the serial number that you have supplied.