1927 Article Scientific Explanation Sound Waves Filtered Diagram Dr. GW SI1 TSC1 This is an original 1919

This is an original 1919 black and white print ad for Olde Stonesfield Roofs by The John D

This is an original 1943 black and white print ad for Marmon-Herrington of Indianapolis

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Would you like to sign up for out Arctic Adventurer Club perks program

Please note that there is slight bleed through on this ad from the print on the reverse

1927 Article Scientific Explanation Sound Waves Filtered Diagram Dr. GW SI1 TSC1 This is an original 1919This is an original 1927 one page article (one single sided page) by Paul Welker on how sound waves are filtered. CONDITION This 84+ year old Item is rated Very Fine +++. Light aging throughout. Light creasing. No natural defects. Some light surface rub. No tears. No water damage. Please note there is print on the reverse, thus some bleed through may be present. Product Type: Original Print Article; Black White Grade: Very Fine +++ Dimensions: