The box sticker on the pic says C10PGRE, which would match an ordinary Endura with ZDP steel. It isn't quite clear if the handle is dark green as it is on the "normal" ZDP Enduras.
However, whatever it is, there hasn't been any FFG ZDP-189 blade in the Endura series yet, and this blade is positively an Endura blade AND ZDP-189 AND flat ground by Spyderco since the logo is there. So it can't be some custom "Frankenspyder", instead it seems that Spyderco itself made at least SOME Krein-like FFG ZDP E4 blades.
Since the sticker says the same as for the normal saber ground ZDP Enduras and the code dates it back to August (!), I think it is unlikely that this flavor of the Endura is officially out (yet), so no according sticker with an appropriate SKU (like "C10PGREFFG" or similar). Maybe they just took a stock saber ground E4 ZDP, ground it to FFG and etched their logo back in.
Either
1) this one slipped right through and is an experimental E4 that is not an official variation
or
2) Sal has surprised us again with a knife that came out of nowhere.
Given the fact that VG10 FRN FFG E4's are ante portas "early next year" and the box it came in hasn't an appropriate sticker, I doubt that though.
But unless he or Kristi wants to chime in (which they obviously don't want yet), we can't be sure.