official Safes
bad, bad memories there. One mis-set by ID10T who set numbers by leaning over to extreme side so the number seen was NOT the number in the middle of dial. Strangely enough, no-one could open it using numbers provided. Cue locksmith. Another where two tumblers locked and two unlocked. At least that time the new combination was tested with door open so repairs were possible. Safe was in a remote area so no chance of locksmith but it was extremely beneficial to have a large unit to stash items of high toxicity and other portable attractives.
Lastly, the mechanisms in safes are solidly constructed. Failure to retract suggests it was not unlocked. More likely, one set of tumblers combination was wrong, or worse, key and lock damaged.