This is an original headlamp dipper switch, mounted on the floor of Rolls Royce Silver Shadow or Bentley T1, that includes the rubber cap.It is made by AC Delco of England.it is similar to the Lucas unit used in most 1960's Jaguar Saloon; but is far superior.  The Rolls Royce Shadow I book shows factory part number of UD11434 for the switch, UD13323 for the rubber protector; but this is an improved later version, with the rubber protector as part of the switch. The switch failed in my own MK2; I planned to install this, but sold my MK2. This has an attached cap, unlike Jaguar, and a rubber cover to prevent water damage; as happened on my Jaguar.it includes about 2 inches of heavier wire than Jaguar used, same color code; blue, blue/white,blue/red..This should work on any classic, including American with a floor mounted dipswitchThe distance between mounting holes is 1.5 inches; you may have to redrill your floor...I also have  many other Jaguar MKII  and Daimler 2.5 or 250 parts.Please click on the red door, go to my eBay store, then click on the Jaguar Saloon  or Daimler Parts  section. I have many thousands of original British parts, all marques;  1948-1994, in my Time-warp  SEBRING,FLORIDA warehouse, and several hundred on my eBay store, Old English Motor Company. Those are organized into 20 categories, including Bentley, Rolls Royce, Jaguar Saloon and Daimler parts.  .. If you do not see what you want; contact me, I will post photos in the store for you.    Please  inquire  1954JAGUARS ,  or  1 954 JAGPART...SHIPPING  in the US is by FedEx Please give me your phone number for the box..... Outside the US is FedEx   .Thank you, James Dean, thejaguru.