Here’s a video explaining the dialing sequence for a Sargent & Greenleaf lock, it is probably the same sequence as your Yale lock (somebody please correct me if I’m wrong!): http://wheelpost.com/Video/dialing_medium.mp4
It’s usually recommended that the owner change the combination upon receipt of a safe, so the sticker might simply be wrong. Luckily the door is open which should make it easy to determine the existing combination if you’re familiar with such locks. A fairly decent intro is http://crypto.com/papers/safelocks.pdf
What’s interesting here is that Protectall was a Mosler brand yet the lock is a Yale? Maybe yours was built before Mosler acquired Protectall?
