Not sure how long these have been around, but I've only just seen one.
Can someone talk me through which bit of the mechanism is being used as the the minute hand?
Edit: ah no need I've now found the explanation here: http://www.ulysse-nardin.com/en/swis.../FreakLab.html
And more here: https://www.hodinkee.com/articles/th...imited-edition