This is a consignment item. While I am unable to date this definitively, I estimate it hails from the 1960’s or 1970’s. It is an invitation to Queen Elizabeth II of Great Britain’s birthday celebration. The party was given by British Ambassador Steel. The invitation is addressed to Ludwig Freiherr von Hammerstein-Equord. He came from a very old Prussian military family. I have no details about him, however, his father was Freiherr Kurt von Hammerstein-Equord (1878-1943). He was a high-ranking, highly decorated officer in WW I who served on the general staff. Ultimately, he was appointed Chief of Staff in 1930. Violently anti-Nazi, his influence was greatly reduced after their rise to power. This beautifully engraved invitation measures 5″ x 6 1/4.” What makes it so interesting is that it is autographed by Prinzessin/Duchess Viktoria Luise (1892-1980)on the reverse. She was Kaiser Wilhelm II’s only daughter, and married Duke (Herzog) Ernst August of Braunschweig in 1913. Along with her signature on the reverse, that of von Hammerstein-Equord can be seen. It is all in very fine condition.