Independents

The complication adds a central jumping seconds hand to the movement.

The entire construction can be admired once the top plate is lifted - a amazingly few parts!

To understand how the mechanism work let's first inspect the construction drawing.

What immediately strikes is that this jumping seconds mechanism, in contrast to other solutions like the Debethune or Gönefeld, both developed by Renaud & Papi (if I am correctly informed ;-)), require little parts and is integrated into the going train. As you can see in the drawing above, the jumping seconds mechanisms takes its energy from the normal going train of the movement. In fact, it interacts directly with the fourth wheel of the movement.

Having understood where the energy comes from, we now will try to understand how the system works. Looking through the small window on the top plate, we notice a lever interacting with the teeth of a wheel:

Here it gets a little tricky, and I hope I can convey the concept. Let's look at this following drawing:

Of central importance is pinion 34, which (the one with the red ruby in the first drawing above!) interacts both with the fourth wheel (=seconds wheel, dotted circle) as well as with the fine-toothed wheel 26. However, since the spring 32 blocks the wheel 26 (through interacting with wheel 30 that is tightly mounted on 26, top graphic), pinion 34 can only move along 26 (in top drawing 34 it would move downwards). This is possible as 34 has a flexible bearing. 

While doing so it draws spring 32 with it. At some point 32 releases wheel 30 (and thus 26 as well) and the complex 26/30 can move, driven by 34, in a given increment (bottom graphic). This increment is defined by wheel 30 which has 60 teeth - there you are, 60 precise seconds jumps!

To facilitate understanding I'd like to share with you a video kindly provided by Hanbring2. It shows how spring 32 moves, and also how the upper bearing of pinion 34 oscillates back and forth:

After all this theory some relief in form of live pics - of course here with my very own Habring² Jumping Seconds with the gorgeous black dial:

The Jumping Seconds complication can be added to almost any of Habring² 's in-house movements or additional complications. For example to this Full Calendar/Moonphase watch: