Image:Balance Wheel in Early Watch Berthoud.png

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[edit] Summary

Description

Illustration of a balance wheel in an early watch, by Ferdinand Berthoud. Alterations: Detail cropped from drawing showing entire watch disassembled.

Source

Downloaded from Ferdinand Berthoud (1805), L'art de Conduire et de Regler les Pundules et les Montres, J.M. Eberhardt, Paris, Plate 2e on Google Books

Date

Published 1805

Author

Ferdinand Berthoud

Permission
(Reusing this image)

Public domain: the author died in 1807.


[edit] Licensing

Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.


Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement that rule of the shorter term.


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Date et heureDimensionsUtilisateurCommentaire
actuel6 juillet 2007 à 14:14464×366 (37 Kio)Chetvorno ({{Information |Description=Illustration of a balance wheel in an early watch, by a master watchmaker of the 19th century. From Ferdinand Berthoud (1811), ''L'art de Conduire et de Regler les Pundules et les Montres'' |Source=http://books.google.com/book)

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