Your Marlin model 90 shotgun was made from 1937-1958.The letter G prefix to your serial number indicates that yours was made in the year 1950.The value will range from 230-400 dollars,depending on gauge and if your shotgun has a single trigger(more) or double trigger(less).
Your Marlin model 30AS was made by Marlin in the year 1995 with the serial number that you provided.
Your Marlin model 60 was made in the year 1996 with the serial number provided.
With the serial number that you have supplied,your Marlin model 60 was made in the year 1976.
Your marlin model 39A was made in the year 1980,with the serial number that you have supplied.
Your serial number indicates that your Marlin model 995 was made in the year 1984.
marlin 22 model 39A serial number Y6410
Your serial number indicates that your Marlin model 60 rifle was made in the year 1973.
Your serial number indicates that your Marlin model 336 was made in the year 1971.
Your serial number indicates that your Marlin model 1894 rifle was made in the year 1982.
Your serial number indicates that your Marlin model 60 was made in the year 1985.
Your Marlin model 25MN was made in the year 1990,with the serial number that you have provided.
Your serial number indicates that your Marlin model 39A was made in the year 1981.