Unidentified Remote Combination Viewer Vaults

[VaultDoors]

I have stumbled across many Remote Combination Vaults (without viewers) in my quest to discover all known Remote Combination Viewer Vaults. Remote Combinations (and bolt-throwing handles) are either flush-mounted on the door jamb or surface-mounted on the door jamb in a case with illuminated combination dial(s) and a pressure system lug. Check out the Remote Combination Vaults album.

All Remote Combination Viewers either have a pressure system lug like One King West:



or serve as the pressure system lug lock like the Cleveland Federal Reserve:

[RiemannHypothesis]

Wow guys, those are fantastic pictures! Keep posting more :)

Best regards from Germany

[T Davison]

What was the pressure system use for on these vault doors?
Why are the early doors round and the later doors rectangular with the pressure system?


How is this vault door locked or unlocked?
Enjoy TJ

[Huw Eastwood]

What was the pressure system use for on these vault doors?
Why are the early doors round and the later doors rectangular with the pressure system?


How is this vault door locked or unlocked?
Enjoy TJ

[VaultDoors]

The four electric contacts plug into the four 'receptacles' when the locking bolts are extended. Located opposite of each bolt contact above the inside/top of the jamb.

[VaultDoors]

The former Philadelphia Federal Reserve vault is now part of Jefferson University's 'JeffLab' and has a remote combination viewer on a round vault door:



If you look closely at the current pics above you'll notice a pair of remote combination viewers directly across the hall:



I assume this a cylindrical vault similar in design to the one at the PA Treasury:



There appears to be an entrance platform (or the shape of one) on the floor in front of the cylindrical vault entrance but it may just be a floor design to match the look of the entrance platform on the round vault door across the hall.