File:Benrus Watch Balance Wheel 2.jpg

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English: Balance wheel in a Benrus DN21 watch, probably made in the 1950s. The movement is a 17 jewel ETA 1280 made by the Swiss ebauche maker ETA SA. The balance and spring are made of low temperature coefficient alloys of beryllium and nickel. The watch is mine and is accurate within about 5 seconds per day.
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Author Chetvorno (talk) (Uploads)

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Balance wheel in a Benrus DN21 watch, probably made in the 1950s. The movement is a 17 jewel ETA 1280 made by the Swiss ebauche maker ETA SA. The balance and spring are made of low temperature coefficient alloys of beryllium and nickel. The watch is mine and is accurate within about 5 seconds per day.

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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:
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current00:58, 25 June 2007Thumbnail for version as of 00:58, 25 June 2007908 × 682 (117 KB)Chetvorno (talk | contribs)Balance wheel in a Benrus DN21 watch, probably made in the 1950s. The movement is an ETA 1280 made by the Swiss ebauche maker ETA SA. The balance and spring are made of low temperature coefficient alloys of beryllium and nickel. The watch is mine and i

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