This Remington manufactured late variation sear spring is for the Nylon 66 semi-auto rimfire rifle and is in near excellent condition with light wear.  (file photo)

Date Codes: Firearms manufactured on the following dates have been observed with this part: March 1967, May 1968, December 1969, October 1973, March 1977

Note: Remington Nylon 66 rimfire rifles with the following date codes and/or serial numbers have been observed with this part: 2136810, 2339644, 2380815, 2467081, 2492224, A2307685 & A2307966

N.S.N. : (WH) August 1960, (DH) September 1961, (PJ) June 1962, (EJ) October 1962, (BK) January 1963, (KK) May 1963, (RL) November 1964, (LM) February 1965, (LN) February 1966, (DN) September 1966, (RN) November 1966, (CP) April 1967, (CS) April 1969, (PS) June 1969, (OS) July 1969, (RT) November 1970, (AW) March 1972, (CW) April 1972, (AX) March 1973, (OX) July 1973, (LY) February 1974, (CY) April 1974, (EY) October 1974, (BZ) January 1975, (AZ) March 1975 Ser. # 2482446,  (CZ) April 1975 (DZ) September 1975, (XZ) December 1975, (DI) September 1976, (XI) December 1976, (BO) January 1977, (EV) October 1979, (RV) November 1979, (LA) February 1980, (OC) July 1982, (EC) October 1982 & (CD) April 1983