Always something new. I picked up those Mag Switches that TxCrosshair had offered and they turned out to be a pristine pair and unusual - at least to me. These have "magnesium" etched in the left lens where we are accustomed to seeing etching on OEM lenses. I've not seen that before and I have several other pairs of this style in all three colorways that do not have this etching. Anybody else seen this etching before?