DESIGN:
An early example of a similar design, not in New York, but perhaps from the same foundry, was posted on Instagram by Chico_Polte.
UTILITY:
Based mainly on location and size it's probably a sewer cover.
RANGE:
This design is found in all boroughs often in connection with a city park or housing project. This one was found in Van Cortlandt Park near the at the south end of Van Cortland Lake recreation center and rest rooms and is the earliest dated example of its type I have seen in NYC.