Marlin would not give me production totals but the first year of production for the 70HC was 1986 and 1993 was the last year of production. The factory 15 round mag that came in the box with the 70HC "High Capacity" is harder to find than the gun itself. If you do see one now there $30 to $50 depending on condition. Crazy!
Try Gunpartscorp.com, ebay, gunauction.com, and Marlin. Good luck
If you subtract the first 2 numbers of your serial number from 2000,you should be able to get the year of manufacture.I can say that the model 70HC was made from 1989-1995.But I can find no serial number data on the model 75C.
If you subtract the first 2 numbers of your serial number from 2000,you should be able to get the year of manufacture.I can say that the model 70HC was made from 1989-1995.But I can find no serial number data on the model 75C.