Striking and unusual original Lauterwasser of Überlingen/Bodensee photograph of three greatest of all Soviet musicians - Richter seated at the keyboard, with Slava leaning over to demonstrate something and Oistrakh looking on.  Dated 1970 in pencil on the verso, the year after their celebrated Beethoven Triple Concerto recording with Karajan. Small crease to right edge, else fine condition.  7 x 9.4 inches (18 x 24 cm.).