RN20-JR

12R • 4H MTM
May 1972 - Jul 1978

RN20-KR

12R • 4F MTM
Nov 1972 - Jul 1978

RN20L-KR

12R • 4F MTM
May 1972 - Jul 1978

RN20L-KR

12RM • 4F MTM
Nov 1977 - Jul 1978