This Winchester manufactured rear sight dovetail screw is for mounting the 30-B rear sight into the barrel dovetail on a model 1890 slide action rimfire rifle and is in very good condition exhibiting a brownish gray patina with light 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.: 261432 & 292176