A Bell UH-13J helicopter (s/n 57-2728) at the National Museum of the United States Air Force at Dayton, Ohio (USA).
USAF
2007-10-18
U.S. Air Force photo <a rel="nofollow" class="external autonumber" href="http://media.defense.gov/2007/Oct/18/2000440041/-1/-1/0/071018-F-1234S-011.JPG">[1]</a> from the <a rel="nofollow" class="external text" href="http://www.nationalmuseum.af.mil/Visit/MuseumExhibits/FactSheets/Display/tabid/509/Article/195802/bell-uh-13j-sioux.aspx">fact sheet</a> on the museum website.