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1922
1924
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1923

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France creates PTT Administration
PDF: AT&T Annual Report, 1923
AT&T Annual Report, 1923
Photo: Western Union telegraph operator
Western Union telegraph operator
PDF: Dictograph 1923 Catalog
Dictograph 1923 Catalog
PDF: Ericsson 1923 multi-line phones catalog
Ericsson 1923 multi-line phones catalog
PDF: Ericsson 1923 telephone catalog
Ericsson 1923 telephone catalog
PDF: Kellogg 1923 Catalog
Kellogg 1923 Catalog
PDF: Sterling Telephones catalog
Sterling Telephones catalog