DID chains - how to tell a fake?

Pikey

www.tbbtours.com
Simple - if after say, 3000km it's dragging on the ground like a whore's drawers, then it's a copy..... :)

Seriously, I haven't heard of "copy" chains. Cheap chains, copy watches and phones e.t.c but no copy chains. You could check that there are O rings in it, that the sideplates and rollers look substantial but in reality, I'd say only time will tell.

Cheers,

Pikey.