Sargent and Greenleaf combo on Sentry D888

[New2combo]

Hello, I learned to pick locks a few years ago and use that skill here and there from time to time. I'm not the greatest, but do enjoy helping out family and friends. Such a great feeling when that tensioner starts moving. It sucks when you realize you picked it in the wrong direction. I have not purchased the spring loaded spinner....but on to the reason I started this post.

I purchased a Sentry safe model D888 (locked) and was provided with a cade that the previous owner stated he had obtained from Sentry. He stated he was not able to open it and learned it could be off by one or even 2 numbers, up or down. He was a nice guy and allowed me in his home to get the safe. I thought it would be a nice puzzle to solve and took it home. I've watched several videos on manipulating combo and read the post on what is inside an S&G lock (very informative).

I recalled reading somewhere on a different post, a suggestion to turn the dial clockwise 5 turns and to stop at 50. Then to turn smooth and quick (counter clockwise) to feel for clicks or bumps. Possibly 2 bumbs and to take note what numbers they were.. There was no more info as the posting person managed to "BUMP" the safe open.

I tried just that and did feel some bump or drag near the 7 or 8 and then near the 12 or 13. NOW WHAT?

I have tried the numbers in that post 25-50-75, 25-50-25, etc.... and no luck. I'm pretty sure its a newer safe as I see the model still on sale online, so I've tried left, right, left when inputting the combination.

I KNOW its a Sargent and Greenleaf lock, just don't know the model of the lock. Online it states its a model that has a relocate, but the number for the S&G lock is not provided.

Looking for any help.

Also, if I could get guidance on the process/importance of the number area I located that had the 2 clicks/bumps. Is that the right and left contact points?

Thanks for your help with this puzzle.

[MartinHewitt]

It seems you have a project.

My guess is, that it is a standard S&G lock, the cheapest available, which is the 6741: https://www.youtube.com/watch?v=FdaygLwmCNo . There is a relocker inside the lock, but to make another guess: There is a standard relocker in nearly all US safes, which is next to the lock and held by the lock cover or a plate attached to the back of the lock. I suppose they meant a relocker like this.

Links to a wealth of information how to open a safe lock with unknown combo are in this posting:
viewtopic.php?p=496300#p496300

[Safecrackin Sammy]

The "bumps" you are feeling are the contact points.

It sounds like you either have the wrong combination, or dialing sequence.

There is no "master" combination for the group two mechanicals. Just the combination.

[New2combo]

Ok, I thought it was the contact points.

This safe has a handle beneath the combination, im trying to upload pics of the safe. I have not found a video of this exact model being "CRACKED". I saw a guy cracking a safe in 9 minutes, but I think the lever on this safe makes his version a different type. He either pushes the dial in or he tries to unlock the safe at ZERO.

Let me get the pics posted. And I'll look at that link you provided.

[MartinHewitt]

It is not that important that it is exactly the same model. All modern Group 2 lock work basically the same way.

[New2combo]

Looks like puzzle time means I'm working on a graphing technique. I'm only at video 3, but gonna start to graph away.

[New2combo]

I only made it to half of video 4 and realized Its quite complicated. I think I'll stick to brute force and keep trying combos. If the contact points are between 6 and 14, would the last digit be about 10 numbers larger (to the right) of the contact area? The one video I saw appeared to be 10 to 20 numbers away (to the right) of the last digit.

What are yalls thoughts on that?

[MartinHewitt]

With bruteforce you should test about every 1.5 number, that is 67 numbers all around. The last wheel has a "forbidden zone" of 20 numbers (0-20). So there are 67*67*53 = 237917 possible combinations. Every 2 numbers might be ok too. That is then 50*50*40 = 100000. If you get it open with every 2 numbers it takes on the average 14 hours if you can test one combination per second. With 10 seconds per combination you are at 140 hours = 17.5 work days. Have never seen one who did that manually.

[Safecrackin Sammy]

I only made it to half of video 4 and realized Its quite complicated. I think I'll stick to brute force and keep trying combos. If the contact points are between 6 and 14, would the last digit be about 10 numbers larger (to the right) of the contact area? The one video I saw appeared to be 10 to 20 numbers away (to the right) of the last digit.

What are yalls thoughts on that?

Brute force will take forever. You will probably quit before you get too far. Try graphing, but use the numbers the previous owner gave you and see what happens. Maybe he just had them written down wrong. Dont reinvent the wheel yet.

[New2combo]

I appreciate both of the last two comments. Thanks guys.

I've tried running the numbers the previous owner gave with plus and minus 2. I even rearranged the numbers, in case he was dyslexic and no luck. I've tried a few and am maybe a few hundred in. My living room is starting to look like black ops video game with all the numbers....WHAT DO THE NUMBERS MEAN, MASON? (Or a beautiful mind)

I will give it a shot to graph the numbers and see if I can DETECT the differences. I was surprised that I had to try and detect a bump by 1/8th of a number....I was hoping it was 1/2 of a number.

My approach at this time is trying a combo as 10 20 XX and going through all the 3rd number options every other number. Then I can write off that code. Tons of codes to enter, I better get back to it.

[New2combo]

With bruteforce you should test about every 1.5 number, that is 67 numbers all around. The last wheel has a "forbidden zone" of 20 numbers (0-20). So there are 67*67*53 = 237917 possible combinations. Every 2 numbers might be ok too. That is then 50*50*40 = 100000. If you get it open with every 2 numbers it takes on the average 14 hours if you can test one combination per second. With 10 seconds per combination you are at 140 hours = 17.5 work days. Have never seen one who did that manually.

The las wheel, meaning the last digit of the combination?

So only work 10 20 (21-99) for example?
Then 10 21 (21-99) and so on???

[Raymond]

Does anyone have a picture of a Sentry D888? It must be relatively new as I have no reference in my Elmer Howard books.

[billdeserthills]

Does anyone have a picture of a Sentry D888? It must be relatively new as I have no reference in my Elmer Howard books.

http://sentrysafestore.com/safes/sentry ... -feet.html

[Raymond]

Thanks Bill. Someone must have added the S&G lock as the only option on the website is an original electronic lock. And, that electronic lock is built in so it would not be easy to change out. Curious and curiouser. I'd still like to see a picture.

[billdeserthills]

Sentry does (or did) make the D888 with a dial, it looks like their more expensive line
https://www.amazon.com/Dial-Shelf-Secur ... B00A33UOPK

but of course a pic would be nice, fantasy can only take ya so far