Meilink safe combination?

It's best to lock the door in the open position so that no one will accidentally close it.

Look at the back of the door. Is there a small opening shaped like a diamond with a tail coming from one corner directly behind the dial? (It looks kind of like a kite.) Also, does the dial ring have a mark at about the 11 o'clock position? If yes to both it's relatively easy.

Inside the door I found a panel held in place with six screws. I removed that and found a bellcrank that connects to the three bolts that lock the door. To the left of the bellcrank and behind the dial is a metal box with a cover held in place by two screws. It is connected to the deadbolt that secures the bellcrank.

Thank you.

The actual combination lock should be directly behind the dial. On most safes it's a rectangular box slightly smaller than a pack of cigarettes with rectangular bolt that extends from the short side about half an inch. This bolt engages the mechanism that extends the three bolts in such a manner that the bolts can't retract until the small bolt on the lock is withdrawn into the lock body.

Does this metal box you described have an opening like I described that looks like a diamond with a tail? Is there a brand name or logo on it? On the outside of the door, does the ring surrounding the dial have a small line or mark at about the 11 o'clock position?

Pictures would help. Can you upload to an image sharing site such as imgur.com and post a link here?

Photo:

OK, you have an older lock where the combination is set by hand rather than with a key. The vertical bar on the top right of the lock and spring mechanism in your photo is a relocking device. If someone were to forcibly punch in the dial in a burglary attempt, it would be pushed back and release the spring-driven bar into the notch in the boltwork preventing opening. When you take the back off of the lock, you'll need to reset it to its present configuration when reassembling.

If you remove the two screws and the back cover you can see the inner workings which are a series of notched wheels and a lever with a bar called a "fence". It's best to have a second person turn the dial while you observe the mechanism. As you spin the dial you'll observe how each wheel has a pin (called a "fly") that engages the next wheel. Turn the dial several times until all wheels are moving. When the notch (called a "gate") in the last wheel is directly under the fence, note the number on the dial. Change direction of rotation until the gate of the next wheel is directly under the fence. You'll probably need to turn two full turns and a partial turn. Note this number. Change rotation again until the notch in the last wheel is under the fence. Note this number. Then turn until the fence drops into the gate and keep turning until the bolt slides back. That's your combination.

If you wind up with the last movement of the dial going the wrong way, start all over but begin turning in the other direction.

There are several YouTube videos that go into some detail should you want to change the combination. Here's one:

Note that once you figure it out and have a working combination, reassemble everything and test it at least TEN TIMES with the door open before you lock the safe. It is FAR easier to fix things with the door open than with it closed.