It is on a wall in the staircase landing that opens into Tony's shop.
You can see it the best in IM2 when Pepper goes to visit him and he makes her CEO
I have a thread at the RPF and it has received zero replies. It's hard for some threads to get exposure since they broke the forum up so much.
The printcident was just crazy, I thought this thread was jinxed. I made a couple test threads and slowed added to them, starting with the picture URL first then adding some text , everything seemed to work so I added the title and BOOM, no worky
I have Binged every possible combination of the words "Americana / American / USA / Flag / college / print / lithograph / art / poster" and a bunch of words I can't remember.
I don't know why this one is so hard to find.