File:Philips 1904 MiniWatt vacuum tube pic1.JPG

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Original file (1,473 × 3,509 pixels, file size: 1.41 MB, MIME type: image/jpeg)

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Description Philips 1904 MiniWatt vacuum tube
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Source Own work
Author Alf van Beem

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Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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Date/TimeThumbnailDimensionsUserComment
current19:10, 25 May 2018Thumbnail for version as of 19:10, 25 May 20181,473 × 3,509 (1.41 MB)Alfvanbeem (talk | contribs)

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