A great find, thanks for sharing!
It looks like there are no bolts on the bottom of the door (or they are well hidden). Certainly this would not be a problem with a door that big!
Sadly there is no glass to show off the boltwork. But it let them save a little money, no need to make it pretty.
The vault itself is two levels and quite spacious. Almost Goldfingerishly open. Too bad the web page’s panoramic views are so tiny.
At first glance it looks like there are six combination locks but one of them seems to be something else, some other control or a “retired” lock position.
Can anybody translate the lettering on the crane?