| There are a lot of images on
these pages, please be patient when downloading. |
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I invite you to click on the small
picture to see a larger version.
These photographs are not to scale
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Early Telephone Line Switch |
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c. 1900 - This switch has exposed,
early style, binding posts that are likely pre 1900. Could
have been used about the time of the conception of Keystone
Telephone Co. of Philadelphia. |
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Early Telephone Line Switch |
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c. early 1900's - Early telephone line switch,
used to enable two phones to be switched between one line,
or one phone to be switched between two incoming lines. |
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Keystone Telephone Co. of Philadelphia
Intercom |
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c.
1910's - Measures 8 7/8" X 6 5/8"
- Not only is this Intercom
interesting because it is marked Keystone, but additionally
it is part of an intercom system with the novel feature of
being able to receive calls from outside the premises, and
to put them on Hold. I have no idea who manufactured it and
am not able to open without damaging the instruction paper. |
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