This Remington manufactured late variation .375" +/- wide rear sight base is for the later manufactured No. 4 and new model 4 rolling block rimfire rifle and is in very good condition exhibiting a grayish brown patina with surface rust specks and light wear.  (file photo)

Note: Remington No. 4 and new model 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: 233272, J256749, J290872, J313458 & 331072

32 Rimfire Takedown Frame: J-305717