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Patek Philippe

Something I read...

 

Unfortunately, I have no personal experience with the 240 movement (but a Ref. 5140 would be my grail watch). In a review of the Patek Philippe Ref. 5146 posted in this forum the author said:

Still a perpetual calendar was and still often is seen as a delicate mechanism to use and settle. The new annual calendar invented by Patek Philippe was intended to be much more usable, and as efficient. 

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