Photoshop? Who cares? None appear to be original. They are "copies" and who knows what generatrion of copies. Once copied then everything else is up for grabs. The film for copy changes things from the get-go. Then there is scanning and publishing on the internt and your screen settings. Photohop is the least of the issues. I'd say if I was going to photshop it, I'd bring some of the color into balance.
There are other issue, IIRC, the Ethel Collection claims a copyright to the T-bolt pic, it also claims copyright to almost every color pic of an aircraft ;-)
The whole thing appears to be selling photo-copies of the Mona Lisa.
BTW, I found the original of the 190 pic under my mattress. Note the "yellow edge from age". And the "squggles" appear more red than green. I also shot an elephant in my pajamas. How he got in them, I do not know.
