Daniel Braillard, the COO of Baume & Mercier, is itching to show me something. The pleasantries ahead of the interview are going on, but he holds in his hand a Baume & Mercier Classima and in the other his iPhone, in its case. I take the bait. What's up? Is there to be a demonstration?* He nods, and places the watch on a device that connects to an app on his phone which measures the accuracy. It is measured at +6 seconds per day. Not bad. The Classima has a viewing window on the escapement. Next he places it over the iPhone case. Specifically, he places it on the part of the case where a magnet is concealed, which allows the flip front of the case to securely close. The escapement, as if stunned by a blow, wobbles and then stops moving. He places the watch back on the device … the accuracy is now +1.9 minutes a day. * We go through the process again with the Baume & Mercier Baumatic, an absolute breakthrough watch for the brand, which offers a 120-hour power reserve and an antimagnetic movement, either COSC certified or not, depending on the model. Without spoiling…

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