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Horological Meandering

The Jean Daniel Nicolas is a two-minute tourbillon....

 

meaning the carriage rotates once every two minutes. Most tourbillons rotate once a minute around a fixed fourth wheel. The JDN fixes the third wheel and the fourth wheel is placed within a mini-bridge withing the carriage.  The JDN is also powered by two mainspring barrels for a 72 hour power reserve, while the Breguet has one for a 40 hour reserve.

I think you are right to say that the resemblance is merely superficial.

The bridge of the JDN is brilliant on both design and execution. It still makes me smile when I look at it.

Bill

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