I adjusted the shadows a little when I opened the raw file in CS2 (to liven it up and make it more like the real thing), nothing else has been done except border and watermark.
I like the sinister, sort of threatening look of the edition here, though the original is also quite good, as it shows a bit more of the ground and gives some detail there.
I find the centred water mark to be a (huge) distraction, really.