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Patek Philippe

rattrapante tourbillon

 

You seem to know your stuff ragarding perpetual calendars and their greater complexity compared to the basic chronograph complication.  But, you're mistaken in thinking that the rattrapante is a trivial 11-piece addition to a basic chronograph.  While there are fairly simple non-column-wheel rattrapante designs (what you're apparantly alluding to) the classic 2 column wheel rattrapante is very difficult to execute, much more difficult than even a tourbillon.  In fact, the classic rattrapante is around the difficulty of the minute repeater.

Here's a reference about the difficulty of the rattrapante in rleation to the basic chronograph:

www.hautehorlogerie.org


Here is one of the reasons why a rattrapante is difficult to adjust (see Alberto's comment):

Edited by Dje:  as per forum rules:

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Thus, we no longer welcome nor allow any mention of their magazine or website.

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Eric von Schonberg
This message has been edited by Dje on 2008-09-13 06:10:23

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