They are common as heck now, it was an apparition then.
I was working at Lockheed Shipbuilding in Seattle when the 747 was undergoing its flight certification. The shipyard was north of Boeing Field, west of the flight path out of Boeing Field.
I could see the planes taking off through a multi-pane window. A Learjet would zip across the window. A 727 would go across a little slower but still fast. But the 747 seemed like it took forever to make it across. Yet they all were going about the same airspeed.
I know it was all a case of perception, but at the time when 747s had not been seen outside of the Seattle area, it was an impressive perception!
I remember as a kid my dad took me with his Rotary International Club on a visit to tour inside one of the first 747s at the airport.
Going through some family papers I found an old ad that included my Dad’s townhouse development along with the 747 and a Control Data “super” computer! It was a full page ad with drawings of all three - and how the bank was providing loans to all three to “move us into the future”.
Pretty odd to see my Dad’s family-owned business up there with Boeing and CDC - but I guess that was the point of the ad (small to large loans).