File:Uhrmacherin.jpg
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Deutsch: Uhrmacherin
English: Lancaster, Pennsylvania - Hamilton Watches. Operation - vibrating hair spring - skilled operation - hair spring is placed into a vibrating machine and operator selects the hair spring with an elastcity which would vibrate a balance wheel with "period" of 18,000 times per hour. , 1936 - 1937, ARC Identifier: 518442 |
| Date | circa 1936 |
| Source | https://www.archives.gov/research_room/arc/ |
| Author | Unknown author |
| Permission (Reusing this file) |
Public Domain |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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The original description page was here. All following user names refer to de.wikipedia.
- 2004-05-17 15:11 Stefan Kühn 573×399× (53838 bytes) Uhrmacherin
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:46, 4 October 2009 | | 573 × 399 (53 KB) | Nachcommonsverschieber (talk | contribs) | {{Information |Description={{de|Uhrmacherin Public Domain ARC Identifier: 518442 Lancaster, Pennsylvania - Hamilton Watches. Operation - vibrating hair spring - skilled operation - hair spring is placed into a vibrating machine and operator selects th |
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