This Remington manufactured safety is for the model 514 bolt action rimfire rifle and is known as the late variation having three protruding prongs (see second photo). The overall condition is very good with light wear.  (file photo)

Note: Remington model 514 bolt action rimfire rifles with the following date codes (month and year of manufacture) have been observed with this part: CB (April 1955), LC (February 1956), CD (April 1957), RE (Nov. 1958), BJ (Jan. 1962), OL (July 1964), AM (March 1965), XR (Dec. 1968) & DS (Sept. 1969)