The mission board of the 457th Bomb Group.
Official caption printed on image: '(GM-299-2-457)(16/5/45)(Op's Board's).'
United States Army Air Forces
<a rel="nofollow" class="external free" href="http://www.americanairmuseum.com/media/1473">http://www.americanairmuseum.com/media/1473</a>