The eagle is a nominal 24" x 19" bas relief and after a design by Grueby Faience Co 1904. Grueby custom made tiles and ornaments for the NYC subway stations, and at the Union Square (14th Street), Brooklyn Bridge, and 33rd Street stations these eagle plaques were installed in two slightly different configurations.
The Interborough Rapid Transit Subway, or IRT, was the first subway company in New York City, and opened on October 27th, 1904Station Decoration. Plaques: Grueby Faience Co. 1904. Name tablets: Grueby Faience Co. 1904. Architectural Designs For New York's First Subway David J. Framberger
Survey Number HAER NY-122, pp. 365-412 Historic American Engineering Record
National Park Service
Department of the Interior
Washington, DC. 20240

There were 49 stations on the Contract One subway, thirty-seven underground and twelve above. The underground stations, except for City Hall. No two station plans were exactly alike, but the standard local station was a "T" shape, with "arms elongated parallel to the track," and "stem under the street transverse to the main route.
The raw brick walls and concrete ceilings were then turned over to Heins and LaFarge to be "beautified." The decorative scheme that they devised was certainly influenced by Parsons, for it is again similar to the Paris Chemin De Per De Sceaux in its system of wall division and ornamentation. Heins and LaFarge's plans were subject to the final approval of Parsons, who delegated authority to D. L. Turner, assistant engineer in charge of stations for the Rapid Transit Subway Construction Company. August Belmont also oversaw station decoration; he approved of the first completed station at Columbus Circle, but complained of the use of too much brick at Astor Place, 50th Street, and 66th Street.
In general, the station finish consisted of a sanitary cove base that made the transition from floor to wall, upon which rested a brick or marble wainscot for the first two and one-half feet or so of wall area. This wainscot was applied to withstand the hard usage that the lower wall would be subjected to. The wainscot was completed by either a brick or marble cap, and the remainder of the wall area was covered with three by six-inch white glass tiles, completed near the ceiling by a cornice or frieze. The wall area was divided into fifteen foot panels, the same spacing as the platform columns, by the use of colored tiles or mosaic "in order to relieve the monotony that a plain-tiled surface would present." The full station name appeared on large tablets of either mosaic tile, faience, or terra-cotta at frequent intervals, while smaller name plaques were incorporated into the cornice every fifteen feet.
A conscious effort was made by the architects to create a distinct wall treatment for each station, both to relieve monotony and assist in the identification of different locations, and the "extent of the decoration varies with the relative importance of the stations." Wherever possible, a local association was worked into the decorative scheme, such as the seal of Columbia University at 116th and Broadway. Heins and LaFarge used a number of different details to add interest to the stations. All of them were classically derived but designed with considerable artistic license. Examples of these details include the cornices at all stations, garlands such as at 116th and Broadway, cartouches such as at Spring Street and along the Lenox Avenue line, and flat pilasters and Greek Frets such as at 79th and 86th Streets.
The quality of materials specified by Heins and LaFarge for use in the stations was extremely high. The wainscot was constructed of either buff-colored Roman brick or marble. The vent grills and light fixtures were of bronze, and the ticket booths of oak. Encaustic mosaic tile was used for the color bands and name tablets. Architectural details were executed in either glazed terra-cotta or in faience for the more important stations. Faience is terra-cotta with a more refined glaze requiring two firings which produce an opaque mat glaze. The materials were of such high quality, in fact, that their use had to be curtailed because of expense. Parsons noted in his construction diary, February 27, 1902, that he discussed reducing the expense of stations with LaFarge. By January, 1903 Parsons advised a simpler treatment for stations, and by the next month he ordered that the use of marble should be discontinued except for those stations already contracted for.
Material Subcontractors:

Grueby Faience Company, Faience Color Scheme:
Blue faience tablets
Light blue tile bands
Blue faience cornice
Blue faience plaques
Marble wainscot cap

Astor Place Material Subcontractors:
Manhattan Glass Tile Company, Tiles
Grueby Faience Company, Faience Color Scheme:
Blue faience tablets
Blue tile bands
Green faieence cornice
Blue faience plaques Harper's Weekly January 31, 1903 p. 176.

The decorations will be of tiles, faience, and glazed terra-cotta, with the name of the station plainly marked in panels. All the ornamentation has been designed to help the passenger recognize his station without the necessity of listening for the announcement of the of the guard or reading the signs.

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