I found this wonderful item on The British Monarchy’s photostream on Flickr. British residents in Hollywood sent greetings to King George V on the occasion of his Silver Jubilee in 1935. Click the link to see a few famous signatures. Even more fascinating to me as a former full-time graphic designer, is that the copyright on the image is to Queen Elizabeth II 2013! Her Majesty has a Flickr account AND a copyright.

http://www.flickr.com/photos/britishmonarchy/8618331893/