British Prime Ministers signed photograph Gibraltar stamps featuring Einstein's own equations relating

featuring Einstein's own equations relating to his theory of general relativity

and their third daughter

A superb unmounted mint with full original gum example from the top right-hand corner of the sheet

A very fine unused original gum top marginal imperforate imprimatur lettered AK showing plate number

The page is enhanced by two official embossed seals under the signatures of Castro and Oltuski

British Prime Ministers signed photograph Gibraltar stamps featuring Einstein's own equations relatingAn official 10 x 8" signed colour photograph of Queen Elizabeth II posing with six former British Prime Ministers: James Callaghan, Alec Douglas Home, Margaret Thatcher, Harold Macmillan, Harold Wilson and Edward Heath. Each Prime Minister signs neatly above or below their own portrait in a variety of blue and black inks. In fine condition, with light handling wear. A superb opportunity to acquire six significant British political autographs on a