Patek Philippe Caliber CH 29-535 PS Q

The Patek Philippe caliber CH 29-535 PS Q is a mechanical chronograph with a triple-date perpetual calendar complication.

In Patek Philippe’s own words:

“The caliber CH 29-535 PS Q movement combines traditional design with six patented innovations and an extremely slender calendar mechanism.” –Source

Also this:

“Caliber CH 29-535 PS Q is distinguished by its traditional architecture, combined with six patented innovations relating to the chronograph, as well as by its exceptionally thin calendar mechanism.” –Source

Dial Side:

This diagram points out the location of the complications:

Watches with this calibre:

Additional Resources:

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