How to update an immitation Gucci sack?

I know with genuine LV stacks, the material is wrapped around from front to back, so the logos are upside down on the rear side, (logos are rightside up on the knock offs) or sometimes the threadwork is different. Is there anything special to tip off that a Gucci is a reproduction? Aside from the price!
Answers:

I hear if you rub your hand across and your hand is hot that mechanism it is fake
http://www.handbag.com/fashion/howtolook...

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