www.gunparts.com has a schematic for the marlin 27s
Your serial number indicates that your Marlin model 30A was made in the year 1982.
Your serial number indicates that your Marlin model 30A was made in the year 1979.
Your Marlin model 30A was made in the year 1978,with the serial number that you have provided.
1980.
With the serial number that you have supplied,your Marlin(Glenfield) rifle was made in the year 1980.
1978
30A, yes. A30, no. sales@countrygunsmith.net
around $350-$400, depending on condition.
With the serial number that you have provided,your Glenfield model 30A was made in the year 1977.
You can find it on e-gunparts.com
1978