I got my gun safe in 'as is' condition. Somebody had been screwing with the lock system and I had to make parts for it. Fortunately, those Sargent and Greenleaf lock systems are pretty easy to work on, and by the way they're made, you can index the tumblers on the shaft in such a way that the combination changes from what it was.
Fifteen minute's worth of work, followed by a few minutes of very careful manipulation with the mechanism cover off, allowed me to get the combination and then I proved it effective and reliable by running fifty consecutive cycles of entering the combo, opening the safe, closing it, locking it, scrambling the dial, and re-entering the combo.
A hundred bucks for a decent Homak gun safe (big enough for a dozen rifles or more, plus several handguns and a big pile of ammo) with a full length locking lug is a fairly good deal, I think!
CJ