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Horological Meandering

Absolute agree. That is what I was referring to as far as material science. Much has been for cases but not related to time keeping. I look at my

 

Mag Bang as an earlier example where not only was the case made of a new material but also the plates of the 7750 movement were in the magnesium compounds.
Interesting about the sapphire chain - that may have some time keeping significance with lack of need for lubrication.

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