This Marlin manufactured 20 1/4" long outer magazine tube is for the early model 60 semi-auto rimfire rifle manufactured from 1982 through 1990 and is in very good condition with light wear and a few specks of surface rust. In 1991, Marlin shortened their magazine tube length. (file photos)
Note: Firearms with the following years of manufacture and serial numbers have been observed with this part:
1984: 16359195 & 16426541
1986: 14431919
1989: 11174735