Queen Elizabeth of Belgium: Signature, Historic Puzzle Postcards: This lot offers a captivating composite puzzle—a set of four postcards arranged in a square format—depicting Queen Elizabeth of Belgium in her nurse uniform. Each postcard forms a portion of the complete image, revealing the queen's Red Cross service attire when assembled together. Notably, one of the postcards carries a postmark dated October 8, 1918, adding a historical touch. Additionally, these postcards were originally posted as military mail separately between 1917 and 1918, later taped together on the back to create a unified image of the queen. Further enhancing its historical value, one of the postcards bears a 1931 10+5c stamp featuring the queen, with one of the signatures positioned above it.