Chap was selling an 'automatic pocket watch' on the bay, he'd no idea how it worked, and the photos were pretty fuzzy...
I hadn't seen anything like it, so I took a punt on it...
Turns out it's actually a Victorian Pedometer - those are miles not hours!
The astute observer will notice that the divisions of the "hours" are quarters, not fifths...
After a bit of cleaning and adjusting, it's a rather nice little thing!
The 'pendulum' rotates the steel ratchet wheel.
Calibrating it is going to be good exercise - I've walked 9 1/4 miles so far...
Apparently Thomas Jefferson, the 3rd US president, is credited with its invention, or at least its introduction to the US...