This is the seal for the coolant pump for all Rolls-Royce and Bentley cars from 1980-98.  NOS and no longer available. 

RR part number UE74155

Applicable to: 

Camargue

Continental R/T

Corniche 

Brooklands

Eight 

Mulsanne S

Silver Spirit I, II, III

Silver Spur I, II, III

Turbo R