The Marlin model 24 shotgun was made during the years 1908-1915.
Glenfield,which was made by Marlin Firearms Company made a bolt action .410ga shotgun from 1956-1965.This was the marlin model 59 which is the same shotgun as your Glenfield model 60.
Your Marlin rifle,not shotgun was made in the year 1972.
The marlin model 28 hammerless shotgun was produced from 1913-1922.
With the serial number that you have supplied,your Marlin model 1894 was made by Marlin in the year 1895.
its a gun.Your Marlin model 778 shotgun is a slide action shotgun chambered in 12ga.Magnum.It was available in barrel length,s from 20in.to 38inches.It weights 7 3/4lbs. and was discontinued in the year 1984.Yours was made by Marlin sometime between 1969-1984.
your marlin model 1897 was made by marlin in 1903.
Your Marlin model 30as was made in the year 1988.
Marlin made these for Sears but I do not know the exact date when they started or stopped producing them for them.
I can say that the Marlin model 1898 shotgun was made from 1898-1905.I do not believe that the serial numbers by year of production are available in the public domain.
your marlin model 336A was made by marlin in 1950.
The marlin model 995 was made between the years 1995-1999.
Your Marlin model 780 was made in the year 1977 with the serial number that you have provided.