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May 13, 2008,12:09 PM
 

I read about this stuff ages ago, but don't remember a lot.

There were various attempts at making non-magnetic balances, and several patents towards the end of the 19th century.  The idiea is to improve accuracy by having a non-maagnetic split balance made of two non-magnetic alloys (based on palladium).  There were also non-magnetic balance springs.  I've no idea how effective they are.

L. Leroy et Cie took this to its logical conclusion and made some marine chronometers in the 1950s that were entirely out of non-magnetic metals.

nick

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Paillards patent non-magnetic balance & spring?? any info anyone?

 
 By: G99 : May 13th, 2008-02:50
hi, i've seen a Patek pocketwatch coversion with this on the movement retailed by the 'non magnetic watch company of America'. i'm very happy its a nice high quality adjusted Patek movement with wolf's teeth and rhodium plating, ut its the first time i've...  

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 By: nickd : May 13th, 2008-12:09

According to Britten

 
 By: aaronm : May 13th, 2008-18:33
from Watch and Clock Makers Handbook Mons. Paillard has achieved considerable success with Palladium, alloyed with silver, copper and other metals. In some instances he appears to have used a Palladium alloy for the inner part, and brass for the outer par... 

thanks chaps. its a shame there's no written reference to Paillard and Patek, but

 
 By: G99 : May 14th, 2008-02:50
it certainly looks like a Patek movement. i must admit that the balance doesnt look a lot different to any other balance on a quality pocketwatch of that era. i know i'm a bit of a numpty when it comes to the internals of a watch, but it says its adjusted... 

Why patek?

 
 By: aaronm : May 14th, 2008-08:01
Honestly, I don't see any reason to think of that movement as a Patek. It looks like a nice, high grade, Swiss Ebauche of the time, but I don't see any evidence to support the pedigree. The winding gears, although wolfs-toothed, are not beveled as finely ...