Tropy Washing Machines is a little neighborhood shop on 117th Street between Lexington and Third Avenues.
The sign is sweetly old-timey, but the AT exchange? It probably stood for Atlantic, according to this chart, but it’s a mystery.
Same with the TR exchange on this sign for Alexander Plumbing. The sign comes from an apartment building on Edgecomb Avenue in Harlem.
TRafalger covered parts of Manhattan, TRiangle was the exchange for a section of Brooklyn, and TRemont, of course, part of the Bronx.