How do you open an old push button key safe without the combination?

We have an old combination key safe with two vertical rows of five pins each (1-5 and 6-0). You can't use any number more than once. We can't find the combination. Any ideas on how to open it?How do you open an old push button key safe without the combination?
On TV they usually drill holes and use nitro. LOLHow do you open an old push button key safe without the combination?
If you are the legitimate owner, and have the model number and serial number, you can call the manufacturer. If the original combination was not changed, they mioght help you. It would help, if when you called, that you had a local locksmith present!





Speaking of locksmiths, a local locksmith might be able to open it. The cost should be under $100+taxes.