A fully on-chain, self-contained reconstruction of the Antikythera mechanism, the first computer, rebuilt so it can never be lost. Companion to SVNDIAL. The front dial reads the visible sky, the back dial computes it, and the 6529 turns in the gears. Anchored to Ethereum block 6529. Drag or scroll to scrub time, expose the mechanism, or pull it apart to see the whole train. CC0.