Manhattan: 6th Avenue - 49th Street (West) (1) 870 Sixth Ave., at the N.E. corner of West 49th Street. Also shown is a general view northeastward of the future Rockefeller Center. September 7, 1931. . L. Sperr. Na w~ 121 -A (2) The same; showing only the upper part of building. September 7, 1931. P. L. Sperr.