Insignia of the U.S. Navy Fighter Squadron 121 (VF-121) "Pacemakers", in 1957.
U.S. Navy
1957
U.S. Navy photo <a rel="nofollow" class="external autonumber" href="http://www.navysite.de/cruisebooks/cv16-57/205.htm">[1]</a> from the <a rel="nofollow" class="external text" href="http://www.navysite.de/cruisebooks/cv16-57/index_022.htm">USS <i>Lexington</i> (CVA-16) 1957 cruise book</a> available at <a rel="nofollow" class="external text" href="http://navysite.de/cruisebooks/index.html">Navysite.de</a>