The top floors today. Well, a few years ago. It's an exceptionally well-preserved building. Old photos show the usual coal-soot on the white terra-cotta, but it's been gleaming white with a Pepsodent smile as long as I can recall.
It makes it look antiseptic, which is something you want in a building where they're going to open you up and do squishy things.
I didn't know the building had been built in phases until I saw the old photos, and noted the discoloration. It seems much more pronounced then than now.
As you can see, a small piece of connective tissue was constructed to join the structures; good idea, or people would have fallen to their death daily crossing from tower to the other.