I think the light green interior on some S1s used a different printing method. The blue interior has dots, off set printing. Its the same as the cover, used for tons of stuff even today, save for black which is all solid and done last. The light green interior is solid. No dots. Its looks like a stamp. Its not off set rosettes.

Can anyone else confirm this? 20x magnification or a jewelers loupe will do. :)

I have spent a bit of time looking at cards, but only some looking at DnD items. I may be wrong, its just what I have right now. I cant say why I never looked at these.

Right, so I stated it backwards.  The blue -- with the dots -- is a halftone image.  The green -- solid ink -- is offset.

Foul

aia wrote in Light Green S1 Interior No Dots?:Does that mean that offset (no dots) is made with a modern tech which stands for a late print which means a fake?!

No. :)

For starters, the dots you see, on the front, mean this didnt come off a modern printer. You would need a relatively large and expensive set up, including one plate per color, inks, and things that roll the paper between the different plates. They still print like this a ton of course, but only for larger jobs. Its why PODs look different. You can also look at the paper itself and staples. Its always nice to have originals to compare to. No one was selling fake moderately played D2 monos with a little staple rust for $12 in 2016 as an example.

It would also be easier to fake cards because of their size and input, but those have largely been easy to spot too. It would basically take a James Bond villain to make a fake so good you couldnt spot it in a moment when it came to modules.