1943 Ad Bell Telephone Systems High Vacuum Tube Wartime H.D. Arnold WWII YPM1
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1943 Ad Bell Telephone Systems High Vacuum Tube Wartime H.D. Arnold WWII YPM1

$43.95
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This is an original 1943 black and white and grayscale print ad for the Bell Telephone Systems, featuring the first effective high-vacuum tube, for amplifying electric currents developed by Bell Laboratiries and Dr. H.D. Arnold. CONDITIONThis 70+ year old Item is rated Very Fine +. No creases. No natural defects. No surface rub. No tears. Heavy water stain - bottom. Product Type: Original Print Ad; Black & White / Grayscale Grade: Very Fine + Dimensions: Approximately 6.5 x 9.5 inches; 17 x 24 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) Period Paper is pleased to present a collection of vintage ads, covers, prints, and articles from Popular Mechanics magazine from the World War I and World War II eras. To continue browsing this collection, simply click on the link provided beneath the condition paragraph. Ke

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