Already posted this in another forum, my idea
-Next July 15th Boeing will size the opportunity of celebrating the first 50 years of the 707, it's first civilian real success.
-By coming up with the 707, they jumped off from the 367 to the ...
-The 7 digit as final in type designators has been in use since at least 1933 starting with the 247. Exception confirming the rule is the 314 Yankee Clipper.
-On the other hand, Boeing wants showing it's litterally re-inventing itself, as it did with the 707.
-the front digit was regularely changed from 2 to today's 7
-the 707 introduced Boeing into the real world of air transport
-the 7E7 intends introducing a new age of air travel.
And now ladies and gentlemen , 50 years day to day after the 707 first flight, please welcome the BOEING 807
Alain