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23 h 50 m, 31 dez 1859 ano - Telegraphic Optical Systems (use of flags, or traffic lights)
Adicionado na linha do tempo:
11 out 2017
0
0
312
jose luis herrera lozada
linea del tiempo
Data:
23 h 50 m, 31 dez 1859 ano
Agora
~ 164 years ago
