That is more or less the same as the common -100 lock.
However; it has some extra features.
For being so well built and with a rather limited production, that price is about what you'd expect.
It's called 'manipulation proof'. They are used on big, high security safes like a jewelry store would have
that has a few million dollars worth of inventory stored in it at night.
The govt. buys a few of them too, mostly for the super tough file cabinets with highly classified stuff in them.
They're probably used where they keep all the UFO and Kennedy assination secrets
Look at pictures of the -100s. There is hook that follows and gently rides the 3 wheels. When the combination is done, it drops into the notches or the gate of the wheels that hold the combination numbers.
The -200s have some more parts in there that pick that little arm up off the wheels when the lock is 'locked'.
On -100s, with skill, and lots of practice, a few people can feel the hook sort of skip when the it passes over a gate
in a wheel. If you are good, and know the lock- you can figure out the combination from that.
On the -100, when you do the combination, the little bar drops into the opening or gates on the combo. wheels.
Then you turn it back past 0, and you can feel the bar lift up, pulling the locking bolt up.
On the -200, the bar is lifted up off the combo wheels.
So when you do the combination (correctly),,, you turn the dial back to '0'.
It is spring loaded, and you push it in. Then the bar drops into place in the gates,
and you can now turn it on back towards 90, lifting the actual locking bolt on the lock to open the safe.
As I've said before, the few people that can manipulate a safe lock---
they won't come to your place looking a few Silver Dollars and Grandpa's old Winchester .30-30.
They'll be down at a jewelry store going after a few million dollars for a couple hours of work.