21k Rotor

[5512vs5513]

Hi everyone,

Is there a specific reason on why Patek uses 21k gold to build their rotors?

Thanks!

[OldOak]

In my brief knowledge I think it is on the micro/ smaller rotor where the heavier 21k gold comes into its own. The micro rotor is smaller to allow it to ride alongside, rather then on top of the movement. So the heavier the better to allow it to turn with less movement. Hope that makes sense.


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[Passionata]

Originally Posted by 5512vs5513

Hi everyone,

Is there a specific reason on why Patek uses 21k gold to build their rotors?

Thanks!

they even went further , 22k gold on 240movements the reason posted above