said by Bob4:
By manipulating the lock, can you determine what the last number is? The locks we use at work have a noticeable indent (for lack of a better word) at the last number. Maybe that would give you a clue to decoding the numbers on the wall.
Without knowing one of the numbers in the actual combination, you're unlikely to decode the written combination.
I have tried manipulating the lock as well. I can tell that the 3rd disc is higher than the other 2, but I can't discern a clear number from that disc. Each time I go around I write down all the numbers that stand out, and after 20 times around I don't have a clear leader. Part of the problem is this lock is a bit rough and I feel to many things going around.