age is determined by serial number...and model
The company was founded in 1852 in Norwich, CT. To look up the age of a specific firearm, look up the model and serial number. Calling the company may help in this regard.
Standard Catalog of Smith and Wesson
1855
1995
@ 1943
You will need to buy or find a copy of the Standard Catalog of Smith and Wesson.
1972
1983-1988
@32 yrs old
27 years old
A shotgun made for Smith and Wesson, sold under the Smith and Wesson name.
Standard Catlaog of Smith and Wesson has sn data. Call S&W and they will tell you when it left the factory.
Your serial number indicates that your Smith and Wesson model 59 was made in the year 1975.