September 1966: Placards denoting training hours of the TH-55A helicopters at the U.S. Army Primary Helicopter Center, Fort Wolters, are prominently displayed. 100,001 hours, logged by the Army’s primary rotary wing trainer, known affectionately as the “Mattel Messerschmidt.” The milestone was established by the “Broken Hats” of Class 67-1A-4, commanded by Major L.V. McNesse, Jr.