There's no way I know of to positively ID this
aircraft, but it's safe to say that it's one of the ten Fairchild F-27
Js Allegheny was flying during early 1966. The company dubbed
their F-27s VISTALINERS thanks to the high wing and very large,
elipical windows that surely gave all the passengers imposing views;
even those in aisle seats should have been able to see out well.
Harder to understand is why the Convair 580s, with their low wings,
huge nacelles and conventional-sized windows, were named VISTACRUISERS.
F27 was a designed and originally built by Fokker in the Netherlands,
and later built under license by Fairchild for the North American
market. I caught this one during a brief period of inactivity
between flying its busy schedules; looking at an AL timetable of the
day for clues as to what flight it may have been came up empty because
there were so many F27 trips shuttling in and out of Philadelphia that
there's no way to even guess at it.
Philadelphia, February, 1966