first up, already seen the excellent how to guide by jdmconcept on how to spot fake, however that was posted quite a few years back and the fake ones have copied some of the tell tale signs already like the no. of cross stitches
anyways, i have seen some on sau sell recently as genuine which also appears to be fake perhaps unbeknown to the seller, in any case, there are still couple of signs that are yet to be copied
* carbon on the top centre bit of locking mechanism is dry carbon, not gloss stickered carbon, whole mechanism should be quite heavy
* rear of the locking mechanism does not have a centre hole nor uses normal screws, use torx screws (i have seen some without the centre hole but still using normal screws)
* accrediation tag ribbon underneath is white (ie. painted green on top), whereas genuine ribbon is green on both sides
* main large "Takata" sign does not have corporation on it and should be double stitched on both left / right sides
* if you lucky to get the black box, it should have a sticker dot on which series is inside, not printed dot, also barcode sticker on the left of this info
anyway, on to the pics, found of genuine ones while researching this for the last hour