11 year old Martha Argerich plays Mendelssohn: Caprice, Op. 33 No. 1

This recording is probably an encore played by Martha Argerich in Buenos Aires after performing Schumanns Piano Concerto with Orquestra Sinfonica de la Ciudat de Buenos Aires under the batton of Washington Castro, back in 1952. She gave two encores: the BWV 916 Toccata, by Bach, and this Mendelssohn. The concerto is already on YT, so is the here: Felix Mendelssohn Bartholdy Caprice No. 1 in A minor 1952, November 26th (Buenos Aires, live)