Welcome! Yes, there is a way to get the combination.
Do you know the model number of your safe?
Unfortunately, It is not that simple. On your particular safe, you would need to contact Sentry. They will need the model and serial (which you have provided already above) and a notarized statement of ownership.
Once that information is provided, they can retrieve your combination from the database.
you can contact them directly here :www.sentrysafe.com/CustomerCare/Lost_Your_Combination