Dark Grey - Fire Polarized OO9013-31 Toxic Blast Collection/BackChannel, lens etched, black box, Japan exclusive. Just received mine today to confirm the details, so it's identical to the normal pair except for the etching. I could not get any info on the quantity from the supplier although I did ask, however it sold out within a couple of days or so suggesting the number was low. A cool piece if you are a Frogskin obsessive.
