Seal Oil Rear D-Type OD MGB to 67, Spitfire to 72, GT6 to 72

This is a rear Rear Oil Seal for the D-Type style overdrive unit that was used on the MGB 1963 to 1967 and Triumph Spitfire 1971 to 1972 and Triumph GT6 up to 1972. Cross Ref.# 121-110, 513231, WR78