These are sections F-21 through F-25 of the book of information issued by the Ludlow Typograph Company to its sales force. This particular copy of this book is No. 47, current through 1962. It appears here through the courtesy of its present owner, Jeff Shay. These sections cover the matrix fonts for Ludlow typeface families No. 21 (Delphian Open Title), No. 22 (Ultra-Modern), No. 23 (Typewriter [Underwood Bold]), No. 24 (Garamond), and No. 25 (Stygian Black).
For an index of and links to scans of the other sections of this book, see:
http://www.circuitousroot.com/artifice/letters/press/noncompline/ludlow/literature/sales/salesmens-book-47/index.html
600dpi RGB JPEGs in a PDF.