Hi Darma,
As said to you by email I've got no info on this watch. I've asked yesterday....
I find it strange for Patek Philippe to release such limited series out of any commemoration. I find the document a bit strange too, not very Patek Philippe like.
The wach is not bad on itself, but remains less interesting than a 5250A for me. Still very appealing though.
Cheers
Dje