except:

• The matrix numbers are the same on both the original and the copy - however, on the original the matrix numbers in the run off grooves are "signed" by the person who did them - "EG". If it doesn't have "EG" then it's the fake. 
• The pictures on the folded poster cover are slightly out of focus. It actually looks as if it is copied.
• The matrix numbers on the copy are in quite large hand written characters - where the original had very small hand written matrix numbers.
• The label on the original is absolutely black and not shiny at all. There should be only about 1 mm between the copyright message on the edge of the label and the vinyl - the counterfeit has more (about 3 mm)

Info Provided by Shadow Factory website http://members.aol.com/lwtua/joydiv.htm