[Joe's Garage]

Originally Posted by Jamo

When an mfg does something like that to show off its abilities, all you can say is wow!

Agree, one more just for the heck of it -

Urwerk UR-210S (Auto)



A double coaxial star-shaped cam regulates the retrograde mechanism through its gearing and its rotation defines the trajectory of the minute hand. When the minute hand reaches 60, the double star trips a (one of three) hockey stick shaped spring under the mechanism, which liberates the minute to fly back to the next hour satellite at 0-minutes.

The dial of the UR-210S features a traditional power reserve indication at one o’clock. In a near mirror image at 11 o’clock we find a similar indication. No, it isn’t a duplicate fail-safe, but something much more important which deserves our full attention, because it is actually a world-first complication that indicates winding efficiency over the last two hours.
Has your recent activity been enough to replenish your UR-210’s energy levels? If yes, the winding efficiency indicator will point emphatically to the green zone. If not, you have been using more energy than you are generating, and the winding efficiency indicator will point to the red zone ...

UR-210S “Full Metal Jacket”: The favorite child | Westime

Crazy stuff.