Shape - From: http://www.handcraftbags.com/Hermes_Learning/13.html
The authentic bag’s shape is crisp and pronounced, whereas the fake bag’s shape shows bulges where you would expect a straight line.
Stamp & Contour
The stamp on the authentic bag is clean and uniform, but the stamp on the fake bag looks spotty and irregular. Also, the authentic bag has a slight indented contour above the seam, which is missing from the fake bag.
The engraving on the authentic bag’s hardware, is thin and refined, but the engraving on the fake bag’s hardware is deeper, wider, and the letters are further apart.
For the authentic bag, the cutout of the inside seam is neat, but on the fake bag, the cutout rough.
The authentic bag’s zipper pull has contours, the fake bag’s zipper pull does not.