Like lapdawg mentions tough to tell from the pics...I've examined a "chibson" up close next to a real LP. Serial checked out, weight-wise the fake felt a little light, headstock shape was a little different, binding wasn't quite as nice (overlapping the fret ends) and the case wasn't nearly as quality as the real thing. It fooled all but the LP fans/owners.
But what was a give away (for me) was the way the serial number was punched into the back of the headstock - on the fake it was too neat and had the "Made in the USA" addition.
Check this out :
http://spotlight.samash.com/buyers_guide/a-guide-to-counterfeit-gibson-les-paul-fender-stratocaster-and-ibanez-guitars/
EDIT : This, of course has already been covered, in faaarrr more detail by Vic in a Sticky :
http://www.guitarforum.co.za/general-discussion/fakes-and-how-to-spot-them/
