A 12 spoke wagon wheel design with 2 spokes 'covered' by two bars creating a center space. The 4 numbers are the only inscription on this cover.
Probably a sewer cover, the earliest example of this type I have found dates to 1954 with some later variants (without the date) installed into the 20-teens.
This type of cover is found througout the city, often in parks or near housing projects. This one is from Central Park in Manhattan near the West Drive around 93rd St.