Sometimes I stumble across an example of the sort of thing that made a brand great, even if that brand seems to have lately lost its way. Zenith comes to mind, but today's example is Chronoswiss.

Wind or Grind?
The model is called Sirius:

The movement is a modified Marvin caliber, exclusive to Chronoswiss:

The entire thing appears to be very thin. It is certainly pretty.
I'll wind it heartily.