Necker Cube. First published by Louis Albert Necker, 1832.
Cubes. Stare at the cubes and they will spontaneously change direction.
The Keyhole Collection uses images found tucked away in an archive. Scan the QR code to find the story behind each card.
Letterpress card printed in small batches on an antique press using ecologically sound paper, milled in the UK. A6 card (10.5 x 14.8cm) with brown kraft envelope.