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Looks like circa 1980 at SFO-- the 747SP might be flight 6 HKG-SFO-JFK.

That would never happen today A 747 flight within the US

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The fleet number on the nose landing gear doors, "670," identifies this aircraft as an American Airlines Boeing 747-123, registered as N9670. It would later enter service with Pan American World Airways (Pan Am) as Clipper Empress of the Skies. She'd later be converted into a freighter configuration (747-100(SF)) for operation bu United Parcel Service (UPS), and later, Polar Air Cargo, re-registered as N858FT.