The One King West vault door appears to be missing its glass panel. If you look at the inside of the outer most ring (towards the bottom) you can see what appears to be a track to hold the glass in place. Vault doors of similar design (Cleveland Fed and Equitable Bldg/Capital Grille) have glass panels installed to enclose the locking bolts. Unfortunately, I was unable to find any pics of the vault door with the glass installed.

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