This factory manufactured 20 3/4" long barrel is for the Sears and Roebuck model 2T bolt action rimfire rifle which uses a rear sight that mounts by attaching it to the dovetail notch located in the barrel.  This barrel is in very good condition retaining above 95% original blue finish with light wear and possibly a few specks of surface rust. (file photos)

 Note: Sears 2T rimfire rifles with the following year/serial number have been observed with this part: