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File:Hallicrafters R42 schematic.jpg

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Description
English: Label on the bottom of a R42 loudspeaker cabinet with technical information and early frequency response control circuit.
Date
Source https://www.flickr.com/photos/jamesao/12995862055/
Author Hallicrafters Co.

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This is a faithful photographic reproduction of a two-dimensional, public domain work of art. The work of art itself is in the public domain for the following reason:
This work is in the public domain in the United States because it was published in the United States between 1930 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.
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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.

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The official position taken by the Wikimedia Foundation is that "faithful reproductions of two-dimensional public domain works of art are public domain".
This photographic reproduction is therefore also considered to be in the public domain in the United States. In other jurisdictions, re-use of this content may be restricted; see Reuse of PD-Art photographs for details.

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Date/TimeThumbnailDimensionsUserComment
current07:06, 23 August 2014Thumbnail for version as of 07:06, 23 August 20142,424 × 1,909 (5.28 MB)32RB17 (talk | contribs){{Information |Description ={{en|1=Label on the bottom of a R42 loudspeaker cabinet with technical information and early frequency response control circuit.}} |Source =https://www.flickr.com/photos/jamesao/12995862055/ |Author =Halli...

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