This Winchester manufactured mainspring is for the model 1890 slide action rimfire rifle in 22 short, long, & long rifle caliber and is in very good condition exhibiting a grayish brown 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: 307126, 392480, 637738 & 644101

22 Long: 790566