1700th Air Transport Group Boeing KC-97G-26-BO Stratofreighter 52-2693, Kelly AFB, Texas 1952.  Aircraft is shown modified as YC-97J, flying test bed for Pratt and Whitney YT34-P-5 turboprops.  Retired to MASDC as CH0626 Aug 3, 1964.  Later acquired by Aero Spacelines along with 52-2762 and parts used for B-377SG (Super Guppy)
United States Army Air Forces
1952
Menard, David W. (1993) USAF Plus Fifteen: A Photo History, 1947-1962. Schiffer Publishing, Ltd. <a href="//commons.wikimedia.org/wiki/Special:BookSources/0887404839" title="Special:BookSources/0887404839">ISBN 0887404839</a>  Image source listed as United States Air Force