JFK, around 1970?
I would agree with Dave B on KJFK...
...Eastern operated the L-188 up until November 1, 1977, however, most of them were retired for pax service by 1975. Late in life, most of EAL's L-188's were used on the New York-Washington D.C. Shuttle route. The catch is the Shuttle operated out of KLGA...
...so given that, I am tempted to place it slightly earlier, maybe 1965...
Never the less, a real cool recording! Thanks for digging that up!