Discolor the leather does not - even though it is white - but the seam is on the one hand very quickly dark-black with dirt and on the other hand pulls the thin leather on the sides / seams. I had now cut off the magnet plate and realized that the reason is a thin Plastikfilmchen, which is incorporated into this tab. Because unfortunately this plastic film is broken at the edges of the plate and has cut over time by the vice put leather on the seam and thereupon a scratching Knibbel represents - very annoying! This has occurred the problem may perhaps also be because I pushed the lid to call back and have fixed it with the magnetic-flap back. So I'm almost at the bag 'left' is rotated, so that the device remains compact in the bag still.