it's call Big Pilot’s Watch Limited Edition Markus Bühler,
limited on 12 pcs, and only 10 pcs will be sold, handwind skeletonized UNITAS pocketwatch movement and the 1st BP with see tru caseback.
Reference: 5003-01
Tht gentleman from HK aka BP freak
,claimed tht he is the only and the 1st one who own this watch outside of Switzerland, Europe perhaps.
http://www.sg-roc.com/showthread.php?t=10347some writing from our neighbour country.
and some photos.
pics borrowed