grammofox is a relatively young austrian band with a unique repertoire: they’ve specialised in german songs from the 1920s.
song titles (and rough translations) include “mein papagei frisst keine harten eier” (my parrot doesn’t eat bioled eggs), “wo sind deine haare, august?” (where are your hairs, august?) and “die braut vom alexander, die geht so auseinander” (alexander’s bride keeps getting bigger)…
there are a few sound samples on their website, and they said a CD is in production as well.