Laurindo Almeida and Ray Brown (usually of the group "The LA Four") on a direct-to-disk Jeton 180g vinyl pressing.
The track playing ("Moonlight Sonata / Round About Midnight") features Almeida picking out the refrain of Beethoven's "Moonlight Sonata" on acoustic guitar while Ray Brown (playing a bowed double bass) adds injections of John Coltrane's "Round About Midnight".
On paper, this combination ought not to "work", but - on actual playback - the combination works extremely well.