1943 Ad Bell Telephone Systems High Vacuum Tube Wartime H.D. Arnold WWII YPM1 XDG7 Keywords specific to this image:

Keywords specific to this image: Alpes-Maritimes department

Captain Wm

This is an original 1905 black and white halftone print of the Litani River gorge that is located outside the town of Burghuz

This is an original 1930 monochrome lithograph of a street scene in Mariánské Lázne (or Marienbad)

1943 Ad Bell Telephone Systems High Vacuum Tube Wartime H.D. Arnold WWII YPM1 XDG7 Keywords specific to this image: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. CONDITION This 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 +