Source: 512GB USB drive, unlabeled, found inside a copy of PC Gamer (July 2013)
This is not a pristine museum piece. This is a time capsule . The moment you drop this folder into your .minecraft/saves directory and load it, you are not playing a game. You are walking through someone’s digital attic from the summer of 2013.
/saves/World5/ Last Modified: August 17, 2013 Game Version: 1.5.2 (The "Redstone Update")
Inside a trapped chest at the control panel, a book & quill titled "The Manual." The first page: "If the netherwart gets stuck, punch the piston on the left. Do not punch the right one unless you want a lake of instant damage II."