The 76 mm/50 Mark 33 gun mount aboard U.S. Navy destroyer USS <i>Edson</i> (DD-946) off Vietnam in 1968.
USN
U.S. Navy photo <a rel="nofollow" class="external autonumber" href="http://navysite.de/cruisebooks/dd946-68/069.htm">[1]</a> from the <a rel="nofollow" class="external text" href="http://navysite.de/cruisebooks/dd946-68/index_003.htm">USS <i>Edson</i> (DD-946) 1968 cruise book</a> available at <a rel="nofollow" class="external text" href="http://navysite.de/cruisebooks/index.html">Navysite.de</a>