Dating an iwc watch

The setting lever spring was an evolution of the earlier simple cover plate that simply kept all of the parts of the keyless work in place.Stem set keyless work needs a detent to hold the crown in the winding or setting position.

The movements are definitively identified as Eterna by their keyless work, but their top plates are different from those shown in Jobin.This cover is called the "setting lever spring" in Swiss parts lists, with the generic part No. The other two parts shown are the setting lever and the yoke that moves the sliding pinion.These are smaller, simpler, and less easy to identify with certainty.I don't mind you using these for your own personal research, but if you want to use them elsewhere such as on an internet forum, a web site, or in a publication, please read my copyright notice first and include attribution.If you have any questions or comments, please don't hesitate to contact me via my Contact Me page.

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