Seats
SAS, I only flew 4 CH-47A's: 3 were production prototypes ( 414, 450, 451 ) and one a new 1964 production machine, in which we put a 2000 gal pillow tank and flew it non-stop over a 1000 mile closed course. Very good seats in all, so must have been the good ones you referred to.
Thanks,
John