Yale combination lock 1880's

[Truegrits]

https://ibb.co/YfG6KPt
My 1st time on. I have a safe14" x 14" x 14' with a round door and enclosure that must weigh 300lbs, takes 3 men to move. Has an outside steel shell 1/2 " thick. Must be encased in lead! No combination. I want to try and manipulate. I am a beginner. Can anyone give me any info or point me in the right direction. I believe its starts Left and is a 4 number combination (viewed on another post with the exact same lock.) kricklin Jan 2024. I do know that the first number usually sets all the wheels. And I must find the Cam and Nose position, and then the contact points. Is this correct? Will this technique work on this safe? Any pointers? See Photo attached.Thanks.
Truegrits

Posts: 1
Joined: 10 Sep 2024 18:52

[MartinHewitt]

Hi,
To identify the lock photos of the whole safe are helpful.
To learn about manipulation there are probably three series on yt and there are also a few books online which explain it. Better to have a look at the full description than us repeating it here in short.

[FranklyFlawless]

Any pointers?

One resource to start:

https://www.mattblaze.org/papers/safelocks.pdf