Leather pens tiffany

How to pick a American combination lock? - american lock combination recovery

I have an old lock at school that I am in a safe and now I can not remember the combo box, and I want to open it. All the ideas that they are cheap and do not cut the lock. I have tried to have the feeling, but I think two editions. I also tried the soda can idea where the thing slipped back into the lock does not open lock. Has anyone other ideas?