Plaque @ Main &Osborne Cambridge Factory Site - Bell & Watson used factory telegraph wire for first 2 way telephone call - 1876 photo

gfc3 | all galleries >> Public Family History >> Cambridgeport Factory 1850s to 1881 > Plaque @ Main &Osborne Cambridge Factory Site - Bell & Watson used factory telegraph wire for first 2 way telephone call - 1876


16-SEP-2012

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