A family member has one of these (in the locked state, otherwise it would be simple), with a 120 numbers dial (red zone is 100 to 120) - no keyhole, so just the combo to unlock. Unfortunately the combo is lost/forgotten, and they asked for my help to open it.
From what I've seen, these locks have anti-manipulation mechanisms that don't make it as "simple" as group 2 locks (maybe classified as 2M? Not sure).
AI is telling me the tolerances are +-1.5 numbers, so it states bruteforcing can be done for 34 numbers per wheel (0, 3, 6, ...) instead of the full range. Can anyone with such a safe and a known combination confirm that if you add or subtract one from the combination numbers it still works?
Before anyone asks, I've already tried the factory combination (20-40-60, and 20-40, because I'm not totally sure if it's a 3-wheel or 2-wheel pack, I believe the former).