This Marlin manufactured tang sight dummy (plug) screw is for the model 39A & 39-A lever action rifle and is in very good condition exhibiting a grayish brown patina with light slot wear. (file photos)
Note: Marlin model 39A & 39-A lever action rimfire rifles with the following serial numbers have beeen observed with this part:
39-A:
39A: (1951) H14371 & H24038