Nope, both 1969, 1970 and 1979 are ruled out.... El Al definitely didn't fly ANY 747s before May 1971. A clue is the Egyptair Il-62 in the background; Egyptair only flew the Il-62 between June 1971 and June 1973, they probably already withdrew the last ones around december 1972. The TWA 707 doesn't help much, it wears the old twin-globe colours, 707s like these could be found till the late 70s. So the photo must be made between June 1971 and around december 1972.
More info on each 707, 747 and Il-62 operational histories can be found on http://people.a2000.nl/sverb
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