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File:Diaphone public alarm advertisement, circa 1942.jpg

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Description
English: Advertisement for the Gamewell Company's Diaphone public alarm system, circa 1942.
Date circa 1942
date QS:P,+1942-00-00T00:00:00Z/9,P1480,Q5727902
Source

https://www.flickr.com/photos/seattlemunicipalarchives/17718564769/in/dateposted/ This image comes from the Seattle Municipal Archives, via Flickr.

institution QS:P195,Q19979269
Author The Gamewell Company
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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.

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current03:13, 27 May 2015Thumbnail for version as of 03:13, 27 May 20151,564 × 2,184 (762 KB)Jmabel (talk | contribs){{Information |Description={{en|Advertisement for the Gamewell Company's Diaphone public alarm system, circa 1942.}} |Source=https://www.flickr.com/photos/seattlemunicipalarchives/17718564769/in/dateposted/ |Date={{circa|1942}} |Author=The Gamewell Com...

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