File:Le Roy escapement mechanism.jpg
Le_Roy_escapement_mechanism.jpg (646 × 528 pixels, file size: 59 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:12, 20 December 2009 | 646 × 528 (59 KB) | World Imaging | better | |
20:32, 19 December 2009 | 413 × 505 (49 KB) | World Imaging | {{Information |Description={{en|1=Le_Roy_escapement_mechanism}} |Source=[http://books.google.com/books?id=ch4JAAAAIAAJ&pg=PA1] |Author=Ferdinand Berthoud |Date=1802 |Permission= |other_versions= }} Category:Chronometer |
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