Just to add to this thread, here is a nice image of the door. Notice that the pressure-bar anchors have been removed. This seems common for conversions (to restaurants, etc.); the lower one is a trip hazard and the upper one can be a head-banging hazard. Some other images show a flexible electrical conduit running through the doorway which was probably how power was applied originally to interior lighting (meaning there were no holes in the vault wall) and Iāll guess that more recently power was moved to a discreet hole drilled for that purpose. Itās also not unusual to find part of a vault wall removed for the added safety of patrons; this could also provide an alternate path for power.
The following image is from http://www.flickr.com/photos/delobbo/5858321680/ and is slightly modified from reality (HDR, High Dynamic Range, a method of tinkering with color balance and exposure after the fact).
Here is a different image that shows the power conduit (courtesy of the Bedford, IIRC):
