1939
1941
Bell Labs prototype wall phone
Ch. Milde Fils phone
Stromberg-Carlson 1243
PDF:
AT&T Annual Report, 1940
Ad: AE 40 color brochure
Video: A Modern Aladdin's Lamp, About Vacuum Tubes (Western Electric)
PDF:
Automatic Electric 1940 catalog
Video: Pennsylvania 6-5000 (Glenn Miller & His Orchestra)
