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Ever see a balance like this?


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I was just drinking coffee this morning and poking about on Ebay...when I happened upon this movement.  The seller didn't seem to know much.  I can tell it's a Swiss bar, key wind & set, no idea of the maker.  But I have never seen a balance wheel like this.  Ever.  Has anyone on this forum seen one like this?  I'm curious to find out more.  I wonder if there is a mechanical explanation to this design, or if it's done purely for aesthetics.  It's fascinating either way.  And it looks like the largest diameter they could cram in there too, which would have several advantages.

s-l1600.jpg

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There is always something different that comes into the workshop with horology. I first started as a watchmaker then went into clocks for around 30 years.  Due to the internet I see new things nearly every day. You never stop learning.

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