Levis 501 Questions and auth check

[overmind1632]

What are the ways to tell the difference between a real and fake pair of levis?

I'm mainly referring to the 501 cut but any hints will do.

How is this pair?

eBay: LEVIS premium 501 capital e wpl 423 dstrsd jeans 29 32 (item 190114379609 end time May-22-07 17:57:53 PDT)

and

Are the levis being sold by this guy real also?

eBay Seller: kgm1999: Men's Clothing, Diecast, Toy Vehicles items on eBay.com

Also, what does it mean when the waist and length size isnt stamped on the back tag?

Herers the sizeless tag example

http://www.dblportion.com/diana/apri...s501notag3.jpg

And, on the back red tab, the R next to the levis is upside down. Is that a sign that its fake?

so what does that mean?

Thanks a lot

Here are some more pictures

Are these real?

http://i19.ebayimg.com/05/i/000/a2/86/2f14_12.JPG

http://i9.ebayimg.com/01/i/000/a2/86/2b2f_12.JPG

http://i10.ebayimg.com/03/i/000/a2/86/2c39_12.JPG

http://i12.ebayimg.com/07/i/000/a2/86/2d3c_12.JPG