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if the IWC in question is the rare ref 1832 from the 70's made to 280 examples in steel with the 8541 es movement based on the 8541b then IWC .No AP and no Patek for me.

 

Technically the IWC is superiorto the two others. The 8541b is superior to the AP 2120 based on the jlc 920 because of the pellaton winding system, finish wise perhaps less nicer than the patek but much more resistant to magnetism and the value of the rare Ingenieur IWC jumbo SL has skyrocketed and it costs as much as a nautilus.

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