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There
are many go-withs in the insulator hobby and one that stands out as an
integral part of the early communication network is the telegraph keys
and sounders. There were three main devices used in early
telegraphy. The one
everyone is familiar with is the telegraph key and the lessor known
sounders and relays.
Here is a look at some of the different styles that
were used before the phone became widespread and replaced the old dot
and dash form of communication.

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Standard key marked
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Unmarked key
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