Many decaded ago when I was in junior high we had lockers that had combination locks that were part of the door itself. They were not padlocks, they were embedded so to speak.
I know there are many ways to "pick" a combination padlock; you can shim it, rip of the back and look through the hole, or even do an absurdly long math method. Never actually tried the math method.
What I would like to know is if there is a way an embedded combination lock can be "picked"? Obviously there are many better ways to by pass a locker door, such a crowbar etc. But can such a combination lock be "picked"?
Would perhaps the method you see in old movies using a doctors stethoscope work? Any ideas?