PATENT OF PIANO CONSTRUCTION 1950 Greeting Card

Text on the reverse side: The exact middle of a piano keyboard is not middle C, but is actually the space between E and F above middle C. The impressively intricate instrument has over 12,000 parts of which 10,000 are moving parts. * A6 size (148mm x 105mm) * Luxury pearlescent eco-certified paper * Produced in our London studio * Trivia fact on the reverse * GS1 barcode for POS * Biodegradable cello bag (unwrapped option available)