Potluck Picnic Puzzle (PPP) Mystery Cache

Placed for the enjoyment of those attending "Potluck Picnic in NCOG Territory" (GC5TNCE) http://www.geocaching.com/geocache/GC5TNCE_potluck-picnic-in-ncog-territory  Solve the puzzle and then you have an easy P & G.  The cache is NOT at the posted coordinates.  Go there and you may annoy the golfers in action.

Now on to the puzzle.  Replace the "number of the beast" (Rev 13:18) with aircraft model numbers.

N.  Boeing aircraft that took its maiden flight on Feb. 9, 1969.

W.  Another Boeing aircraft.  Maiden flight Apr. 9, 1967.