What did this old NYC phone exchange stand for?

You see these two-letter old phone exchanges around occasionally—often on old signs off the beaten path, even though New York City phased out the letter exchanges in the 1960s.

In the East 80s of Yorkville, I spotted a mysterious one: a parking garage sign with a phone number that begins with “TW.”

TW? It’s one I’d never seen before, and I can’t figure out what local landmark or old neighborhood lent its name to a phone exchange that could be as old as the 1920s.

Of course, the garage door company that used the number might have been located in any part of New York City. If anyone knows or wants to throw out a guess as to what TW stands for, I’d love to hear it!