Ulysse Nardin's Tellurium J. Kepler watch rotates the Earth as it would be seen above the North Pole. The timepiece was named in honor of Johannes Kepler, a 17th century astronomer who formulated the Laws of Planetary Motion. Only 99 of the timepieces were made and they are priced at more than $100,000. From the Ulysse Nardin product page:
A flexible spring bends from the Tropic of Cancer to the Tropic of Capricorn to reveal the part of the Earth lit by the Sun and to indicate the time and place of sunrise and sunset. The moon rotates around the Earth.Link (via Thoughts From The Sidelines)
The dragon hand indicates the eclipses of the sun and the moon. The perpetual calendar completes one turn each year.
David Pescovitz is Boing Boing's co-editor/managing partner. He's also a research director at Institute for the Future. On Instagram, he's @pesco.