This basic design has been used since around 1953, The 4 numbers are the only inscription, without any indication of it's manufacture. The basic wagon wheel motif has been used for sewer lids since the 1870's
Water or Sewer Connections. Years I have spotted range from 1953 to 1998.
This style cover is generally seen in New York City parks and housing projects, this one is on the western side of Harlem Meer in Central Park.