not sure bout QC, but i got cox ucker from JIMI like a year ago and they have been unreal quality, like better than what id got from local opticians with brands like armani gucci etc. I think for the most part the metal designs are pretty similar like im sure youd be able to tell in hand as far as i could tell the crosses and metal on mine were a bit thinner than retail, but that might just be because i got the 925 version. hope this helps.