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
- Museum of Fine Arts, Boston.1
- National Art Service Co.1
- National Colortype Co.1
- National Negro Post Card Co. (Cincinnati, Ohio)1
- Nationwide Post Card Co.1
- Neel, Tom.1
- New Orleans News Co. (New Orleans, La.)1
- New Orleans News Company (La.)1
- Norfolk Printing Co.1
- Norwood Souvenir Co.1
- O'Neall Specialty Co. (McAllen, Tex.)1