If the case is new 0-0-0 will open it. If not you have to crack the combination which is not to difficult on a three digit lock. start with likely number sets if that doesn't work srart counting up from 000 to 999, it can't take that long.
To reset the 3-digit combination lock on a Mont Blanc briefcase, first, open the lock using the current combination. Once open, locate the reset lever or button, often found on the side or back of the lock mechanism. Move the lever to the reset position, set your new combination by turning the dials, and then return the lever to its original position to save the new code. Test the new combination to ensure it works before closing the briefcase.
bolt cutters....
un- unlock
With the briefcase that I have, I had to put in the unlock combination. Then hold down the unlock button or latch and while holding it down change the combination. Once you release the latch or button the combination will have changed. Try out the new combination to verify.
A briefcase with a built-in lock is the most secure option.
A briefcase can be locked with a combination lock or a padlock. A file can be locked with a password.
Follow these rules to open your briefcase:1. Set the briefcase on its side with the latches facing you.2. Dial the three-digit combination on each latch using the serrated metal wheels with the numbers embossed on them. Be sure to dial the numbers one at a time, left to right.3.Place your thumbs on the two latch buttons and slide outwards to spring open the latches.4. Lock the briefcase by closing the case, snapping the latches until they click shut, then turning the numeric wheels on the combination locks to scramble the numbers.
I'm not sure which master lock you are asking about, but see related links below for methods of opening combination locks
I think combination locks are safer since key locks are easy to break into with a knife or a ice prick to unlock the key lock.
Lock = Bloqué Unlock = Débloqué
It doesn't seem high tech has caught up to the briefcase just yet. There my be a prototype out there for no digital briefcase lock on the market.
The Jack Georges Platinum is a great compact briefcase which has a combination lock and metal frame.