Raymond wrote:I have a safe that looks very similar. Mine has the Yale OB lock. It has two active wheels and an active drive wheel. (three total) It's drop point and contacts are between 0 and 10. If you put handle pressure it actually binds the lever and nothing can be felt. The lever is gravity powered. The heavy end blocks the bolt bar. When the correct combo is dialed, gravity pulls the heavy end of the lever down. The short, light end then moves up into the gate of a wheel. Some of the oldest, original locks like this would open if the safe is turned up side down. The lever would swing completely out of the way of the bolt bar, but the newer ones blocked that movement.
Try to dial it open just using numbers ending in 5 or 0. You might get lucky.
a couple photos to help show what Raymond described:
the lock as you would see it if the safe door was transparent:

the lock mechanism interacting with the bolt work as seen from the inside of the safe, the combination wheels and cover have been removed from the round opening where they normally sit. The drive wheel is visible with the lever resting inside it's gate.

This is a wheel pack *similiar* in design to what would be in your safe lock body. The wheels are on a post which is attached to the cover plate.

If I have made any errors in descriptions, please let me know so I can fix them.
Squelchtone