Very nice rare stamp.

Duchess Elisabeth in Bavaria (born Elisabeth Gabriele Valérie Marie, Duchess in Bavaria) (25 July 1876 – 23 November 1965) was Queen of the Belgians as the spouse of King Albert I. She was the mother of King Leopold III of Belgium and of Queen Marie José of Italy, and grandmother of kings Baudouin and Albert II of Belgium. During the German occupation of Belgium from 1940 to 1944, she used her influence as queen and German connections to assist in the rescue of hundreds of Jewish children from deportation by the Nazis. When Brussels was liberated, she allowed her palace to be used for headquarters of the British XXX Corps, and presented its commander General Horrocks with its mascot, a young wild boar named 'Chewing Gum'. After the war she was awarded the title Righteous Among the Nations by the Israeli government.