Thanks for your knowledge WHBM. It was their first flight on a Jet aircraft, so VERY memorable, both the 97 yr old and their 77yr old son's eyes shone as they recounted their experience. By the sounds of it, it was an American Airlines 707, it must have looked and felt like a spaceship to them coming from dreary London back then. They mentioned the new smell inside the huge cabin.
The fact that it was 'a delivery flight' as they described it would suggest it came from Seattle to NY to be officially received by AA HQ and then put into revenue service, which they had the pleasure of being on.