What time is it? Watches and horology

Nomos world time calibre:

This is cool (whilst the sun is shining):

This is how it works:

1. Position the sundial so the sun shines
   onto it.
   
2. Set the correct date in the middle
   ring on the hole.
   
3. Let the sundial hang freely from the
   thread, with the hole towards the sun.
   
4. A ray of sun on the inside of the ring
   shows the correct time.