This NFT collection is based on the X3-BOX augmented reality sculpture. Hidden inside the sculpture are digital scans of X-ray tubes from the archives of the German Roentgen Museum. Using a specially developed application, the viewer can look inside the X3-Box. However, each new attempt results in a different artifact appearing, so the true contents of the box remain a mystery. Shown at Witten University at the X3-BOX exhibition.