Autograph testimonial from the great pianist, honoring the Steinway family in 1953. "To Theodore Steinway and the dear Steinway family congratulations on having completed the first hundred years of a glorious contribution to music. I am thiking of you with a feeling of deep gratitude, and I am sending you affectioned greetings and good wishes. Rudolf Serkin, Guilford, August 1953." Very fine. Together with a vintage 8 x 10 inch publicity photograph