[drc]

One thing is if the graphics appear sharp, colorful and clear. With many reprints, it graphics are of noticeable lesser quality-- duller, muted.

Also, if you had a black light you could identify much modern paper as it will fluoresce a bright light blue. Many modern reprints are identified with a black light.

Lastly, if the back has any foxing (age spots) that would be evidence it is old.

And very lastly, smell the back. Does it smell old, mildewy? Modern paper wouldn't smell that way.

Again, the only thing from the written that concerns me is is the modern printer paper size.