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Patek Philippe

Spare Wheel

 

I have puzzled for years over this, so I'm finally going to ask!

Most movements I see have all the wheels between the plates, but maybe 5% have a fairly large wheel on top, or outside, of the plates, usually with what, to my uneducated eye, looks like a click at right angles to the wheel.  What does this wheel drive and why do  most watches not need it?

Thanks for any enlightenment

Keith

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Great timing!

 
By: SteveG : May 17th, 2007-20:01
I think your answer is in this thread: www.network54.com What+is+the+advantage+of+direct-driven+seconds-+... with several examples here: www.network54.com Now+that+somebody+has+relieved+me+of+trying+to+explain+the

Spare Wheel

 
By: Keith : May 18th, 2007-16:30
Thanks Steve for your fast reply. I had initially wondered about That wheel being for a centre second hand, but dismissed because so many movements didn't use it. So, what I described as a "click" is a bridge with a pinion hidden underneath and with maybe... 

You're most welcome! & yes, your description seems right on!......nt

 
By: SteveG : May 18th, 2007-19:15