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23 ore 50 min, 31 dic 1859 anni - Telegraphic Optical Systems (use of flags, or traffic lights)

Aggiunto al nastro di tempo:

jose luis herrera lozada

ByLuis Edko Herr

11 ott 2017

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Data:

23 ore 50 min, 31 dic 1859 anni

Adesso

~ 165 years ago

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