Included with the cigar case is a one-page typed letter, signed by Mary Soames, dated 21st November 1995, which states: "I do not recollect precisely a cigar case such as you describe but my father had a number ... this size was convenient for taking a couple of cigars out to luncheon or dinner ... It is possible the one in your father's possession was given by Earl Birkenhead to my father, or more likely in view of the date of the cigar box as a memento after his death in 1930."

J.J. Fox of St. James's, London, supplied Churchill's cigars from 1900 up until his death in 1965 and their records indicate that they supplied this particular brand to him. The firm "Don Joaquin Cuesta" ceased trading after the nationalisation of the Cuban cigar industry by Castro in 1960.