First flights
 

SQ advertised the auction to the A380 first flight as "once-a-lifetime" chance.

Sure, one plane type generally has just one first flight. But then they found someone who, as 17-year-old boy, was on the 747 first flight - Pan-Am JFK-LHR in January 1970, the one which was 21 hours late because engine troubles meant another plane had to be substituted. And invited him to A380 first flight.

What are the other most important first flights?

SQ-s own first 747(200) flight?
Airbus´ first flight (A300 for Air France, sometime in 1974)?
Concorde double first flights (January 1976, simultaneous takeoffs Heathrow-Bahrein and Paris-Dakar)?

Are there any people who already have flown on several historical first flights?