My apologies that you did not receive an earlier answer. Various experts are online at different times and I recently logged in and was notified of your question. Your patience is greatly appreciated!
Sentry safes come with factory-set, already programmed codes or combinations, when you buy them and only the manufacturer can provide you with that information after, you fill out certain forms and prove safe ownership with a Notarized form. Here is a webpage to help you get all the information you need, to retrieve your combination from the company:
As you can see, the phone number and hours of operation are in the middle of the page, toward the right, if you need to call.
I wish you much good luck with your safe!
Please be so kind as to rate my answer with positive feedback, as that is the only way I receive recognition for my assistance. Thank you very much!
Providing a positive rating will not end our conversation, should you need me for any follow-up. Simply click 'Reply to Expert' for clarification or additional information, if needed.