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Patek Philippe

Two technical questions

 

Dear all,


May i ask 2 stupid questions ? 

1) Is there any reason to avoid a big change of pressure in a small amount of time with a PP watch ? I assume this is not a problem as this is what happens in a plane...  But I prefer to be sure (I ask because I will go to a huge cable car with more 10 000 ft difference between up and down)

2) can the time be set backward (just because the watch is 3 minutes in advance on the real time) ? On a 324 based perpetual.

Thanks

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