I have a Marlin model 94 in 32-20.
If you go to
www.savage99.com
it will tell you date of manufacture by entering the serial number. Mine is an original octagon barrel. The serial # is on the bottom of the reciever just behind the forend. On the top of the back tang, it says, Marlin, Model 94. The serial # is 6 digits, no letters. Mine was made in 1904.
Ralph