The 2 letter prefix of AB to your serial number indicate that your Marlin-Glenfield model 30 rifle was made in the year 1966.
It was made in the year 1976.
your marlin/glenfield was made in 1974.
Cannot be answered unless you provide a serial number with this question.
20626860
With the serial number that you have supplied,your Marlin(Glenfield) rifle was made in the year 1980.
The year of manufacture for a Glenfield Model 75 with serial number 27345752 1996.
your glenfield was made in 1968.
Marlin made the Glenfield firearms, not Winchester.
1980.
Your Glenfield model 60 was produced in 1989.
With the serial number that you have supplied,your Glenfield rifle was made in the year 1973.
I found the value of a Marlin/Glenfield (similar serial) to be at about $2,700. I'm looking too, but that's the price I was able to find.