The "Dodo-Postcards" watermark is NOT on the actual card – it is an online watermark only.
New York. Flat Iron Building. Manuel Hofer From Cities at Original Photographic Prints. Just Postcards
Flat Iron Building. New York City. Robert L. Bracklow. Fotofolio. Collection of the NewYork Historical Society
Flat Iron Building. New York. Pictorial. B. Hopkins
Flat Iron Building. New York City
New York. Flat Iron Building. Success Postal Card Co. No. 1012. Irving Underhill. 1912
New York. Flat Iron Building. American Art Publishing. H. Finkelstein. Irving Underhill
New York. Flat Iron Building. Detroit Publishing. Phostint. 1916
New York. Flat Iron Building. Success Postal Card. No. 1006
