This is not the recipe in question, that we know of. (Lakenvelder)

Man Reports Theft Of “Best Egg Salad Recipe In The World,” Valued (By Him) At $4,000

UPDATE: Nothing gold can stay. Especially not a shiny, perfect story about a stolen egg salad recipe.
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For Some Reason, The 'Bacon-Egger' Egg Salad Sandwich Never Caught On

For Some Reason, The 'Bacon-Egger' Egg Salad Sandwich Never Caught On

One dish conspicuously missing from our modern bacon-crazed menus is the “Bacon-Egger.” What’s that, you say? Not a breakfast item, as it is at some establishments, but a sandwich. An open-faced egg salad sandwich with strips of bacon, olives, and celery. Featured in a 1965 7-Up ad, it apparently goes well with a bottle of 7-Up. Or, to translate that into ad copy, the soda’s “frisky taste and lively sparkle give every bite ‘first bite’ excitement!” [More]