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Patek Philippe

Question on vintage movement ... ?

 

Did patek ever produced complete in-house movements for the older but mighty 2499 ??  As compare to Lemania base 3970 ??  WHaT about the even older patek ref : 130 chrono or 1463 chrono, 1526 perpetual & 1518 perpetual chrono .... were they complete in-house developed or out sourced ?

 

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