This is a New Old Stock tail lamp assembly 2 piece lens with Red and Amber Lens. These are No Longer Available and RPI has limited Stock. This is the for very early Shadow Convertible models as well...

This is the red round reflector for the single tail lamp lens.  It is 52mm in diameter. 1956-1962  Silver Cloud I, II and Bentley S-1,2, Early PV's with single tail lamp lens L533

This is the clear park lamp and also known as the reverse lamp on some models.  You will need to provide the car's VIN/chassis number to make sure this will fit. 1946-1965 Various Models -...