reply to Ken
Re: Need help with an old safe Revolutions usually are as follow
Start spinning several times starting left OR right and stop at the first number.
Then spin in the opposite direction, stopping over the 2nd number after you passed it 4 times.
Opposite direction, stop at the 3rd time you pass the 3rd number.
Opposite direction, stop at the 2nd time you pass 4th number.
Opposite direction until the disc locks (Should be no more than 1/2 turn).
Now which one is 1st, 2nd, 3rd, 4th could be several possibility based on the fact that the first digit written is 315.
I bet that the "3" in 315 is a hint and not part of the combination.
3 could mean:
3rd set of numbers is fake: 15 - 16 -38 (So you have a 3 number set, follow the directives above, but start at 3 revolutions instead of 4).
Start at 3rd set of numbers: 89-38-15-16
3rd set of numbers is first: 89-15-16-38
Spin 3 times over 16: 15-16-89-38 but you do 3 revolutions instead of 4, and you finish with 1 revolution instead of 2.
Or you can find a safe cracker in the yellowpages. At the same time you can have him select your own combination