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File:Comparator - DPLA - 5b1b7a2ec4e0c61adc97f3f6c1da73ad.jpg

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Comparator   (Wikidata search (Cirrus search) Wikidata query (SPARQL)  Create new Wikidata item based on this file)
Creator
InfoField
Watertown Arsenal (Mass.)
Title
Comparator
Description
Title from item.; Additional text from item: Provides a check on size and shape with a choice of a 20 to 1 ratio or on a ratio of 62-1/2 to 1. The check is obtained by reflecting the work to a large mirror in the rear and in turn back to a screen facing the operator. The 62-1/2 to 1 ratio will mag. a .001" error to 1/16" on screen.; Date from item or accompanying material.
Date between 1942 and 1959
date QS:P571,+1950-00-00T00:00:00Z/7,P1319,+1942-00-00T00:00:00Z/9,P1326,+1959-00-00T00:00:00Z/9
institution QS:P195,Q29982657
Source/Photographer
Permission
(Reusing this file)
Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
Standardized rights statement
InfoField
No Copyright - United States

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Date/TimeThumbnailDimensionsUserComment
current19:26, 2 November 2022Thumbnail for version as of 19:26, 2 November 20221,005 × 800 (233 KB)DPLA bot (talk | contribs)Uploading DPLA ID 5b1b7a2ec4e0c61adc97f3f6c1da73ad

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