This Winchester manufactured rear sight elevation screw is for the 30-B series rear sight on the model 1890 slide action rimfire rifle and is in very good condition exhibiting a brownish gray patina with light slot wear. (file photo)

Note: Winchester model 1890 slide action rimfire rifles with the following calibers and serial numbers have been observed with this part:

22 Short:

22 Long: 790566

22 W.R.F.: 292176