Your serial number indicates that your Marlin rifle was made in the year 1972.
1975
Simply because Marlin thought it would look better. These gold trigger Marlins are not different than any other Marlin. They were made for a certain number of years with gold triggers, and all models got them at that time.
Your serial number indicates that your marlin rifle was made in the year 1992.
1964
In 1957.
1988. 100-first two digits
175.00 to 200.00 in good condition
1961 (August)-1962.
Might have been replaced.
Around $350
Model variation
I have a marlin model 60 with a gold trigger..the price difference is not by much if any at all..they both cost the same. some gun shops will charge more, but most usually don't and charge the same. A model 60 with etching and wood work can sell for more than one with just a gold trigger.