Just for the heck of it, here are the jeans the fakers are trying to copy: a pair of genuine LVC 1920s 201.Note they have very different arcuate shape with no diamond, a cinch that overlaps with the waistband, and no red tab.The patches rarely look right, but usually there are other warning signs.This pair (below) has the cinch in the correct position - but again, a superfluous red tag, and the diamond shape at the bottom of the arcuate which you'd never find on cinch back jeans, as they should only be found on later, post-WW2 models.Once you get familiar with LVC, you'll see the cut of these is quite simply wrong.They've taken a modern or 50s shape and simply added a cinch - the original is a completely different shape.(NB, there are a couple of horrible early Levi's Japan reissues that look like this.I'm guessing the Thai fakes are probably based on them.).
This pair is much more convincing, with a good attempt at the stitching and shape of a LVC 1947 model.
Levi's leather patches are always pale in colour when new.
They do age to a darker colour, or even dry out to give an effect known as "beef jerky".
Warning 3: Label-conscious Fakes rarely get the two-horse patch right.
Once again, fakers feel compelled to "improve" on the original.