1920 Article Science Invention Patents Electrical Phonograph Spark Plugs SI1

This is an original 1920 one-page article (one single-sided page) of a variety of scientific invention patents. CONDITIONThis 91+ year old Item is rated Near Mint / Very Fine+. Light aging throughout. Light wrinkling. No natural defects. Light scuffing. No tears. No water damage. Please note that there is print on the reverse. Product Type: Original Print Article; Black / White Grade: Near Mint / Very Fine+ Dimensions: Approximately 7.5 x 10.75 inches; 19 x 27 cm Authentication: Serial-Numbered Certificate of Authenticity w/ Full Provenance Protection: Packaged in a custom archival sleeve with an acid-free black board (great for display, gift-giving, and preservation) Keywords specific to this image: Amusement Rides, Ignition, Windmill, Edgar E. Littlefield, August C. Dittrich, James H. Butcher, Poul Peter Anderson, Harry R. Zimmer, John F. Boettner, Dexter W. Allis, Matthew M. Merritt, Jacques Bohli, H. L. Miller, J. A. De Vinoiss, Antique Record Players, Cinematographic Stereos