Delta Air Lines former livery was introduced on the DC-8-11/12 and -51 during Late 1961-early 1962.
It was basically the same widget livery we all know, but with Delta Air Lines spelled down the sides. On the DC-8-51, the small words "FanJet" were on the blue parts of the widget. Other differences were, the bare metal areas on the DC-8 were -lower- on the fuselage, later on they were raised to the cabin floorline, flairing underneath the nose, along with simplification of the lettering to just "Delta" on the fuselage.
I for one -loved- the older Delta Air Lines livery. It was quite classy looking to me.