An Die Musik
"Dohnanyi & Martinu: Chamber Music"(Vinyl)

The Musical Heritage Society (now known as Passionato) was like a jelly-of-the-month club; members (willing or otherwise) would receive recordings in the mail.  The bad news: they all looked like leftovers from Soviet newsprint.  The good news: often times the performances and the repertoire was world class.  You just had to be bored enough one day to pick up this bland, lifeless looking record and will yourself to put it on the turntable.

This particular recording will stay with me because having recordings of both Martinu's "3 Madrigals for violin & viola" and Dohnanyi's "Serenade for violin, viola and cello" are not terribly easy to come by.  They're both really fun, entertaining works to both perform and hear, but they're just off the everyday radar for most listeners.