I have the interior speaking tube whistle but would like more, as this one appears not to whistle. I also lack one for the front door.
Lonnie lonniechu at gmail dot com
About speaking tubes (Wikipedia)
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  A mouthpiece at entry door of house similar to mine in my neighborhood (bottom) |
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 The following are in .pdf format - you'll need Adobe or Foxit Reader. Speaking Tube Supplies Patent lawsuit including speaking tube specs (to a degree) Ferryboat Confession: story published in NY Times, 1900  |
  Speaking tube whistle still in its wall in a home in San Francisco  Three whistles in a row - communicated
with three different locations in this large house. |
Last updated February 7, 2009 lonniechu at gmail dot com