I worked at Boeing my entire career and was in Commercial Flight test nearly the whole time. I was a system test engineer. We designed the installation of the test equipment required to gather test data required for certification of the aircraft. One of the planes I was assigned to was the first 747-200 built and was used for flight certification. It was N747200 I believe the first test flight was on April 15 1969, at least the first flight I was on, and it lasted for 4 Hours and 33 minutes. I subsequently flew 22 more flights. The last being on December 18 1969. During that time I accumulated 80 hours and 8 minutes.
I was then moved over to the 747F RR201 where I had another 30 hours of flight time.
For old time memories I just might have to get this plane when it is released.
Tom