This is a rare  original brake servo or booster from a  US NADA Rover 3500S,1969-1970. This car had good brakes when last driven and still had Castrol Girling in the cylinder when I removed it. it looks much better than those I usually sell, that have been on my shelf for 40 years. This should also be suitable for Austin Healey, MGC, Rover 2000TC and many other nglish cars, or for adding disc brakes to an XK120. .I have  many Rover parts; and hundreds of parts for all British cars 1950-1994, on my eBay store.. They are  arranged in 20 categories. If you don't see what you need, please ASK., and I will put it in the store for you..  Please inquire  1 954 JAGUARS  or  1 954 JAGPART, ... I had compulsively hoarded parts for my restoration shop and my collection for 40 years;  But have moved all to SEBRING, The Heart of Old FLORIDA. I have the largest stock of  original Old English parts in the colonies.. I also give free restoration advice. SHIPPING, in the US is by Standard Post, or OVERSEAS;  is Priority Mail.Some countries,as England now require more expensive but faster Express mail to insure. Shipping overseas is an ESTIMATE; Please give me your country, ..Please inquire.. James Dean, thejaguru. I also give free advice.