I think I'd figured it out.
Supposedly there are eight variation of this SSA "species", and apparently 3 are limited editions.
SSA047K1 -white dial, SS bezel & bracelet
SSA049K1 -black dial, black bezel, SS bracelet
SSA051K1 -black dial, pvd bezel & bracelet (LE)
SSA053K1 -blue dial, SS bezel, blue Nato strap
SSA055K1 -green dial, SS bezel, green Nato strap
SSA057K1 -black dial, SS bezel & bracelet
SSA059K1 -black dial, black bezel with green letter & black Nato strap (LE)
SSA060K1 -black dial, black bezel rose gold case & black Nato strap (LE)
However, there is not even a single official site/source stating or proving the LE, just a bunch of auction site saying it is. I wonder how true is the fact. Also, different seller provide different specs, some say it has sapphire some say hardlex, and the measurement range from 41-45mm. Worst, there seems to be no wrist-shot, as if no one actually bought any of these watches.
