Date: April 2014
Intellectual Property: Trade Secrets
We originally put a magnetometer in our watches to allow them to point the direction to Mecca. Pretty soon, we ended up hacking this ourselves so they would point to North. It's a hidden feature of the Hoptroff range, but handy if you're trying to orientate yourself in new territory.
(And not that easy to do when there are lots of rotating permanent magnets in the timepiece, too!)