your marlin/glenfield was made in 1974.
The 2 letter prefix of AB to your serial number indicate that your Marlin-Glenfield model 30 rifle was made in the year 1966.
Cannot be answered unless you provide a serial number with this question.
With the serial number that you have supplied,your Marlin(Glenfield) rifle was made in the year 1980.
Your Glenfield model 60 was produced in 1989.
The year of manufacture for a Glenfield Model 75 with serial number 27345752 1996.
With the serial number that you have supplied,your Glenfield rifle was made in the year 1973.
Your Marlin Glenfield .30.30 model 30A was made in 1974. For this perticular rifle, take the first two digits of the serial number (Yours are 26). Subtract 26 from 100, and you get the year of manufacture, which is 1974. Hope this helps.
Your Glenfield model 25 was made in the year 1988.