Confirmed by director Lloyd Handwerker, grandson of Nathan's famous in Coney Island, Nathan Handwerker.
Phil Gries' 1961 color footage is the oldest known color surviving film of Nathan's, to exist longer than five seconds.
Kodachrome color 8mm film footage of Nathan's Famous in Coney Island, shot by eighteen year old documentary filmmaker Phil Gries, in June of 1961, included in this documentary.