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Vacheron Constantin

I recall running into the concept of twin frequencies

 

during a visit to Villeret back in 2013. The chronograph operated at 50 Hz in normal operation and could switch to 500 Hz for short-interval timing to 1/1000 sec. VC's application goes in the opposite direction; 5 Hz in normal operation but able to slow to 1.2 Hz and preserve the calendar functions during storage. I think the VC concept is far more practical ;-) 


 Gawd, my wrist was so inadequate for this watch...



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