Is it on the Speakers sleeve on page 5? That looks like morse code to me. That said, not sure they would do the same gimmick twice in a row.

There are also number (and letters?) on top of page 5 above the speaker. On both sides of the orb above him. Though I am not good enough with images to actually make out what it says. [url=i.imgur.com/QQaPS2a][/url]

Maybe a date and time? Looks kind of like 5...5133...2113

After messing with the picture a bit I found this: Left side Slanted right: CS? 5133l Right side Slanted left: ?4Z 21i3 |ili There are probably errors here but since I have no proper skills working with images this is what I could find. I have no idea how these numbers and letters are supposed to translate into an emblem code as there are to many digits