Crazy light, incredibly thin and extremely wearable. Cons, the NPTP can be damaged quite easily! I was trying to change strap on the watch and the screw driver kinda slipped a little and a portion of the NPTP came off!!! Back to the service center...
The 13zn, being a superior movement, is easy to work on. Parts ain't awfully everywhere but they can be found and worse scenario, you can get them from cannibalized watch.
Thank you for your comment and obviously you know your stuff! On the case number on the back of lugs, I have seen a few examples without that number too. Though far and few, I do think they exist but I do not know why. On the pushers, I do think they...
and maybe the rest who has this same watch should chime in. Perhaps it's a batch issue or just your unique piece. And maybe worth more if anyone see this as a particular interest.