Very early picture of two F4H-1s that had been taken over from the USN by the USAF for test purposes. These were assigned USAF serials 62-12168 and 62-12169, but here they still only carry their former USN BuNos (1)49405 and (1)49406 respectively. 49405/12168 was later converted to YRF-4C prototype and struck of charge on 17 August 1971. 49406/12169 crashed on 8 March 1967 near Holloman AFB.
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