You would have to investigate what was done to replace the system screensavers with that logo.
That should not be hard to find out and should not be assumed to be one of the "screensaver hacks" - it may have been done by hand.
First bit of information needed:
Which model of Kindle do you mean by "Kindle 3g" - a lot of models have 3g.
Perhaps this link will help:
https://wiki.mobileread.com/wiki/Kindle_Serial_Numbers