Yet another waltz-related question!

[musikalischer_wirbelwind_280]

I already asked this once, many years ago, but since there are now many members that weren't around back then, it might be worth giving it another try.

Does anyone know the name of the waltz that plays in the clip that I'm embedding here (from about 6:36 to 6:46)?? Like another one featured in Pasolini's "Salò" (I also asked about that here a long time ago, and still don't know a thing about it ), I've been trying to find this out for, literally, years, now, but no luck yet.

Cheers,
M.W.