Oerlikon KDA, 35mm Self-Propelled Antiaircraft Weapon prototype (PT-353 is marked on its smoke discharger) in U.S. service, undergoing tests and evaluation at the U.S. military installations. The Oerlikon turret was mounted on the Leopard tank chassis, the system was operated by a three-man crew.
Lt. Col. Clyde E. Goodyear, Office, Chief of Research and Development, U.S. Army Missile Command
<a rel="nofollow" class="external text" href="https://babel.hathitrust.org/cgi/pt?id=mdp.39015077913963;view=1up;seq=123">Foreign Systems Evaluations</a>, Fiscal Year 1974 Authorization for Military Procurement, Pt. 7, Page 4867