My dad used to work for LeFebure, the competitor for Diebold (pronounced dee uh BOLD). They both build pretty much everything which makes a bank 'a bank,' from vault doors and safe deposit boxes, to money handling systems, to pneumatic tube systems for the drive throughs.
Those cabinets would likely have been used at a teller station...a place for the teller to lock up the cash and valuables he or she is responsible for, while actually working at the teller station.
If I remember well from the few days I got to go to work with my dad, those are good units, built for a lifetime of service. Banks don't usually 'cheap out' when they purchase stuff (and there is nearly a 100% markup on things for installing them). As long as the configuration of those cabinets meets your needs, they should easily live up to your expectations.
Kev