I believe that this model was made from 1989-1995.
Your Marlin model 75C was made in the year 1976.
Your Marlin model 75C was made in the year 1976.With the serial number provided.
Your Marlin model 75C was made in the year 1980,with the serial number that you supplied.
Your serial number indicates that your model 75C was made in the year 1976.
There is no difference internal to the two rifles. The only difference is barrel length. Both have 14-round tubular magazines. The model 75C has a carbine length (~19") barrel. Model 60s produced when the 75C was in production have a rifle-length (22") barrel, but the current Model 60 has been shortened to 19", making it seemingly identical to the old 75C. My 75C from 1987 looks identical to the model 60 on the current Marlin website. If you want to see one in a bit different configuration, check out http://dillonallen.com/blog/marlin-60-aftermarket-stock-install/
The booklet that came with the Marlin 75-20 shows it to be a 75C.
model GA22 ( great american 22 cal) first production 1983 same as marlin model 75C
The booklet that came with the Marlin 75-20 shows it to be a 75C.
If in america, 3 quarters make 75c. With the euro, a 50c, a 20c, and a 5c make 75c
These rifles were made from 1993-2003 by marlin.
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The marlin model 995 was made by marlin between the years 1995-1999.