1943 Ad Bell Telephone Systems High Vacuum Tube Wartime H.D. Arnold WWII YPM1 XDG7 Boy in Suit

Boy in Suit

This 109+ year old Item is rated Very Fine +++

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

This is an original 1947 color print ad for the International Minerals and Chemical Corporation

Keywords specific to this image: Alpes-Maritimes department

1943 Ad Bell Telephone Systems High Vacuum Tube Wartime H.D. Arnold WWII YPM1 XDG7 Boy in SuitThis 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 +