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J. Presper Eckert and John Mauchly
[Trade catalogs from Associated Electrical Industries Ltd.]
Vacuum Tubes, U.S. Army Signal Corps Reports
[Trade catalogs from Eitel-McCullough, Inc.]
Cunningham type C324 vacuum tube
Cunningham type C324 vacuum tube
Cunningham type C324 vacuum tube
Cunningham type CX112A vacuum triode
Keidel Vacuum Bleeding Tube - For the Quick and Aseptic Collection of Blood for the Wassermann and Other Reactions
George H. Clark Radioana Collection
[Early radio tubes.] 1800 photonegative
Weston Electrical Instrument Corp. vacuum tube tester and RCA tube
RCA Radiotron type UX112A triode
Heathkit Assembly Manual Vacuum Tube Voltmeter