The very first Boeing 747 took to the air February 9, 1969, barely four months after the airplane rolled out of its then new factory in Everett, Washington. The prototype, “Queen of the Skies,” was known by her serial number RA001. She was soon joined by additional test aircraft, all working towards the airplane’s entry-into-service in January 1970 with Pan American World Airways. Since then, over 1,500 747s have been delivered.