Right.
The first combination lock was with a dial type system dated back to midevil times. But not nea similar to modern day combination locks.
I'm not sure which master lock you are asking about, but see related links below for methods of opening combination locks
please go away
Dial the correct number to open the lock. There is a combination dial on the machine.
To open a Brinks lock you first have to set the lock on zero. Next you turn it clockwise four complete turns, then do it once more stopping on the first number of the combination. Then turn the dial counter clockwise for two turns, do it once more and stop on the second number, turn the dial clockwise twice stopping on the third number of the combination, finally turn counter clockwise to the fourth number. The lock should then open.
Problems resetting and lock 3-dial combo lock
First, spin the dial clockwise a few times to reset the lock. Then continue turning clockwise until you reach the first number of the combination. Then spin the dial counter-clockwise one full revolution so you are back at the first number. Then continue turning counter-clockwise until you reach the second number. Then turn the dial clockwise until you get to the third number (do not spin the extra revolution this time). At this point, you should be able to pull the lock open.
Take the inside plate off of the door, turn the dial until you see when the lock lines up. Probable a 3 or 4 nunber combination and left right or right left. you will be alble to tell once you look at the lock.
By definition, a combination lock cannot be picked, as it has no key. It can be "cracked" in some cases where putting pressure on the lock and diagnosing the dial can reveal the combination. It can also be "bypassed" where tools are used to open the lock without the use of the combination. Neither of these are "picking" the lock however. In order to pick a lock, it must have a key of some type.
If you know the combination, dial it in, then close the lock, then press and hold the "reset" button. Whatever number you set before releasing the "reset" button will be the new combination.
Many combination locks have three numbers associated with them. A combination lock that has the middle spinner unlocks like this: Turn the dial to the left past the first number and then to that number the second time. Then turn the knob to the right to the second number. Finally turn the knob back to the left to the third number. This unlocks that type of combination lock.
What you do is go back to the store you got your lock and ask a staff there to help you. And then ask him/her what your problem is so they can help you. Hope this works, bye.