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10M telephones (1 ene 1918 año – 31 dic 1918 año)

Descripción:

It was estimated that approximately ten million Bell system telephones were in service throughout the U.S.

Añadido al timeline:

click for descriptions/PHONE TIMLINE

23 oct 2018

0

0

420

fecha:

1 ene 1918 año

31 dic 1918 año

~ 12 months

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