Covers for coal shoots in Brooklyn, where coal would get delivered straight from the sidewalk into the basement, to keep the house clean. Why can't we have functional things be as beautiful as this anymore? https://ephemeralnewyork.wordpress.com/2012/08/16/a-brooklyn-neighborhoods-lovely-coal-hole-covers/
A Brooklyn neighborhood’s coal hole covers
Hole Cover in Brooklyn, NY
This cover is a bit of a mystery. It seems to read “Sewer B of B” for borough of Brooklyn or borough of the Bronx. But it is in Harlem near 125th Street.
“Croton Aqueduct DPT 1862.” It’s in Jefferson Park on First Avenue and 112th Street and refers to the engineering marvel that brought fresh water from upstate to Manhattan.The water was stored in a massive reservoir at Fifth Avenue and 42nd Street, where the New York Public Library is today.