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Aptly named, the 24-bar recurring form composition, "Twenty-Four," rightfully has no key sgnature, since it is atonal. While comprised of V7 I's in +4s as you state, the chord sucession is comprised of a series of 2-bar secondary key areas, descending in semitones through all 12 transpositions.
"November," a through-composed (no repeating sections) 32-bar recurring composition form, is ON Ab. I'm not sure if it's IN Ab, though, since the progression is obscure, and the melody alone indicates no tonic or priority note.
Both tunes develop a minimum of melodic and rhythmic motives (two each). Both also have melodies that are comprised predominantly of melodic 9th, 11th and 13ths, both resolved and unresolved.