A Closer Look
The new Trident Z sticks from G.Skill are covered in slick brushed slabs of aluminum, with a sticker that covers the stick's vital characteristics on one side.
The PCB has an "SA" marking, and default speed and size have been stamped into the other side, so you know the stick is legit.
It's clear that the Trident Z kit I've got here has an 8-layer PCB, and the other side shows some markings that seem to stand for the PCB type and model. Either way, there's nothing terribly important here unless you're looking for something quite specific.