Eastern Golden Falcon DC-8
Eastern's Golden Falcon DC-8-21 pictured on a pre-delivery flight.  At first I thought the image to have been doctored by airbrushing or whatever means in the lower/rear fuselage area, robbing us of the chance to positively ID the ship.  However, a similar photo of (apparently) the same aircraft appears in Classic American Airlines by Geza Szurovy, and shows precisely the same thing.  Perhaps the aircraft was not entirely painted at the time?  If you have more complete knowledge than mine, please pass the facts on to me.  We can guess that this is Eastern's first DC-8-21, N8601.  It flew the company's schedules from January, 1960 to January, 1971.
                                                                                                                                                                - Douglas photo

Noted airline historian and artist Mike Machat explains:

       "...  the elusive "white tail" EAL DC-8. Many other photos of this airplane show the lower tail painted white, possibly sprayed on with a removable water-based paint since the sharp trailing edges of the cheat stripe clearly show gross overspray. As I recall, this was a test for a possible all-white color scheme for  Eastern's new Golden Falcon Jet, a la Delta's Golden Crown 880. The white paint was applied aft of the wing only, to test debris kick-up patterns from the main landing gear. Obviously, it didn't work, and the airplanes wound up with polished bare-metal lower fuselages.

The DC-8 depicted is Eastern's first, N8601. This aircraft, N8602, and possibly N8603 were delivered with the new "complete color scheme" as designed by Raymond Loewy, featuring long titles above the window (also briefly painted with "DC-8B" at the end), and the distinctive all-black anti-glare panel and nose radome. Subsequent EAL '8s were then delivered with a series of changes including titles shortened to "FLY EASTERN AIR LINES," removal of the dark blue cap atop the tail fin, a solid red bird on the tail, and elimination of the nose markings leaving only the standard small black dot on the radome, and a small black-with-red-pinstripe scallop for the anti-glare.

From first delivery in 1959 to the "Hockey Stick" colors in 1965, Eastern DC-8s wore a total of nine color scheme variations."

                                                                                                                                                              - Thanks for helping out with that, Mike!