During March 1961, Lockheed's submission was selected as the winner. President John F. Kennedy's first official act after his inauguration was to order the development of the Lockheed 300 on 13 March 1961, placing an initial contract for five aircraft for test and evaluation, to be designated the "C-141". One unusual aspect of the aircraft was that it was designed to meet both military and civil airworthiness standards. The prototype "C-141A" serial number "61-2775" was manufactured and assembled in record time, having been rolled out of Lockheed's factory at Marietta, Georgia on 22 August 1963. It was also the first aircraft to be designed and produced at the plant that would go into full-rate production. The prototype performed its maiden flight on 17 December of that year, coinciding with the 60th anniversary of the Wright brothers' first flight.