previously mentioned this series, with its great music, eye-popping design, and slightly unsettling illustrations, but this one is even better. Primrose Trio (here rendered in Microgramma as "Prim Rose") have a series of three wild and wonderful LPs with their pictures on them, but this one just gets the lady, this time staring at you. I always appreciate how the guitarist kind of plays the bass notes and kind of plays the chords and almost always plays notes that I would not consider playing given what the cymbaly and fiddle are playing. I can learn a lot.
If you like the illustration, K 6001 (featuring the Thunder River Boys) features the exact same artwork, just, as they say, palette-swapped. It's a good time too, if more traditionally polka-flavored.