So I just got this very attractive keyboard. It's a G80-2500 with Polish layout, and NIB condition, though without the original box.
Some pictures (apologies for the poor quality, only available camera is a Nexus 4):
Front view:

Normal doubleshot key - front:

Normal doubleshot key - back:

Normal doubleshot vs. Polish letter key - front:

Normal doubleshot vs. Polish letter key - back:

The interesting thing is that while most of the keys are doubleshot, it seems that the extra Polish keys are dyesubbed or pad-printed.I don't see any indication of them being pad-printed, so I assume dyesub.