While I waited for the eatery to open, near the roofline I noticed raised letters that read "9th. Ave. Flat." (Click on this or any other photo for a better look.) Many of these inscriptions were intended as advertisements directed at passengers on the Columbus Ave. elevated train. Also known as the Ninth Ave. El, it reportedly stood, at least in part, until the 1950s.
Surviving signage for a "9th. Ave. Flat."
744 Ninth Ave. (50th-51st Sts.), rooftop level



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