That's a fascinating link, you know. The Antikythera mechanism shows that precision and durability don't have to be modern inventions; ancient designers were already thinking in modular, gear‑centric terms. If you could map those hidden shafts into a slim band, you might get a self‑synchronizing, low‑power tracker that feels almost invisible. Curious what specific feature you want to emulate?

A differential in a wristband is an elegant idea—keeps the main drive in check, so the whole thing never stalls. The trick will be scaling those gears down without losing the backlash tolerance that the Antikythera designers had. You might look at modern planetary gearsets or even a micro‑spool system; they can be made thin and light, yet still give that self‑adjusting behavior. Have you thought about how the power source would feed the gear train—maybe a kinetic‑energy harvest from the wearer’s motion? It could truly be a pocket‑watch‑like device that never needs recharging.