This Remington manufactured rear sight with a v shaped notch is for the No. 4 rolling block rimfire rifles and is in very good condition exhibiting a brownish gray patina with light wear.  (file photo)

Note: Remington No. 4 rolling block rimfire rifles with the following serial numbers, calibers and frame styles have been observed with this part:

22 Rimfire Solid Frame:

32 Rimfire Solid Frame:

22 Rimfire Takedown Frame: J 211632

32 Rimfire Takedown Frame: