The Model 34 was made from 1932-1935 the date code (month and year) is stamped on the barrel. You can look up the code here: http://remingtonsociety.com/rsa/questions/barrelcodes
The manufacture date of western field model M782 with the serial 830424 is 2012.
Call S&W and they will tell you when it left the factory.
The manufacture date was march of 1923.
If you provide the serial number in your question then I can give you the date of manufacture.
If you would post the serial number and model number,I can give you a date of manufacture.
What is the manufacture date of a Colt AR15 rifle serial number 192754 model SP1
1920
1920
1932
1939-1955
No sn given.
June, 1941