King George VI - Queen Elizabeth - Double Signed Card 1939

King of the United Kingdom (1895-1952) who reigned between 1936 until his death in 1952; and British queen, wife of George VI who lived between 1900 and 2002, and mother of current queen Elizabeth II.  Season greetings card signed by both, plus a third signature by in pencil photographer Markus [illegible last name].  Size is 5.75 x 8.4 inches, 1 page (folded), minor crack over the right border not affecting the photograph, otherwise in excellent condition.