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The TAC type was manufactured or purchased for inclusion in
the code practice equipment set made by the Telegraph Apparatus
Corporation. (This example key has been epoxied
to a large piece of purple resin!) |
(click to enlarge) |
(click to enlarge) |
It is difficult to tell the TAC type from the ARH type except
for the odd sized contacts. |
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Here you see the two different size contacts. |
(click to enlarge) |
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