Creator
- Metrocraft (Everett, Mass.)1
- Metropolitan Newspaper Company.1
- Missouri Greeting Card Co. (St. Louis, Mo.)1
- Mohawk Products Co. (Memphis, Tenn.)1
- Montgomery News Co. (Montgomery, Ala.)1
- Moody, E. N.1
- Morrill Press (Fulton, N.Y.)1
- Morris & Son (Greenwood, S.C.)1
- Morris, G. W.1
- Morsello, Joseph F.1
- Moss Photo Service, Inc. (New York, N.Y.)1
- Mozert, B.1
- Museum der Stadt Solothurn.1
- Museum of Fine Arts, Boston.1
- Museum of Science and Industry (Chicago, Ill.)1
- National Art Service Co.1
- National Colortype Co.1
- National Negro Post Card Co. (Cincinnati, Ohio)1
- National Press, Inc. (Chicago, Ill.)1
- Nationwide Post Card Co.1