File:Benrus Watch Balance Wheel 2.jpg
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Size of this preview: 798 × 599 pixels. Other resolutions: 320 × 240 pixels | 639 × 480 pixels | 908 × 682 pixels.
Original file (908 × 682 pixels, file size: 117 KB, MIME type: image/jpeg)
| Description |
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. |
| Date | |
| Source | Own work |
| Author | Chetvorno (talk) (Uploads) |
Summary
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.
Licensing
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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: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:58, 25 June 2007 | | 908 × 682 (117 KB) | wikimediacommons>Chetvorno | 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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