This Marlin manufactured cartridge guide spring screw is for the model 39 lever action rifle in 22 rimfire caliber and is in very good condition exhibiting a grayish brown patina with light slot wear.  (file photos)

Note: Marlin model 39 lever action rimfire rifles with the following serial numbers have beeen observed with this part: S13699 & S16012

Note: If this item is sold out, the cartridge guide screw under the Golden 39A Mountie will work as a substitute.