The physical construction of the tunnel began in 1936 and was completed in 1940. It seems as if almost every manhole cover for the tunnel was a unique cast.
The very basic diamond grid pattern with QMT in a box might best be described as utilitarian. The sans-serif type is unlike other QMT covers, with the tail of the Q pointy on both ends and the M descending half-way.
Found in Long Island City on 52st St east of the Pulaski Bridge.