G=1950, and SC=Sporting Carbine.
1990
You need to include a serial number to get a answer.
To determine the age of a Marlin 3030 30AW with serial number 12057784, you can refer to Marlin's manufacturing dates. Generally, Marlin's serial numbers from that era indicate it was produced around the late 1980s to early 1990s. For the most accurate dating, you may want to consult Marlin's official records or a dedicated firearms historian.
By including the serial number in your question,we will be able to answer when your Marlin model 336 was produced.
With the serial number that you provided,your Marlin model 1893 rifle was made in the year 1899.
Your serial number indicates that your Marlin model 30A was made in the year 1979.
The letter F prefix to your serial number indicates that your Marlin rifle was made in the year 1949.
2.50
1995.
the cost 3030 cal 336sc
1968.
The rifle is a marlin 336. Serial number is located on the lower tang under the lever.