This is the original propshaft universal joint for all cars from 1947 to 1991. The original part number was RG6389. It has been superseded to CD4197.   All models from 1947 to 1983 (VIN 6

This is the grease seal for the Detroit joint also known as the trunnion rubber boot. 1956-1965 Silver Cloud I,II, III and Bentley S-1,2,3, Phantom V 1966-1980 Shadow, T, Corniche, Shadow II, T-2,...