Haydn to the Rescue !
London CS 6533. Sonata for Two Pianos and Variations for Two Pianos on a Theme of Beethoven. Bracha Eden and Alexander Tamir.
This is a must for piano enthusiasts as it was performed on a Pleyel double piano. This very rare instrument was actually two grand pianos in one case with one reflective lid. The remarkable thing is how well articulated the recording is. You can tell just which performer is playing just what notes. And of course the piano(s) match in sound exactly.