This Remington manufactured Phillips head butt plate screw is for the late variation model 550-1 semi-auto rimfire rifle and is in very good condition with light wear. (file photo)
Note: Model 550-1 rimfire rifles with the following date codes and years of manufacture have been observed with this part: (CA) April 54, (LB) Feb. 55, (WB) Aug. 55, (PC) June 56 & (XD) Dec. 1957.