Patek Philippe 5740G on the timer

Nov 18, 2018,00:00 AM

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270 degrees is top, as far as I know, for a balance spring made from an alloy

 By: COUNT DE MONET : November 18th, 2018-05:01
But maybe for a silicon balance spring this amplitude is fine?

I provided the hodinkee link [nt]

 By: Karlstumke : November 18th, 2018-05:20

Here is the 5320G

 By: Karlstumke : November 18th, 2018-05:38