The design of the cover is a direct descendent of the design used by the Croton Aqueduct Department, with a few changes (16 spokes not 17!).
This sewerline was one of the first to extend out beyond the bulkhead line of the Harlem River -- a extension necessitated by the change of sewer lines from primarily moving rain water to carrying waste from those newly installed "water closets".
This cover is in Thomas Jefferson Park in Manhattan. (Don't miss the nearby Croton 1866 cover!) Others lids with the same design with later dates are clustered in Morningside Heights and the Upper West Side.