Established As Frères Baume in 1830 in Geneva, by brothers Louis-Victor and Célestin Baume, the brand afterwards partnered with Paul Mercier in 1918, turning into the Baume & Mercier We all know now. During a very hard interval for that manufacturer, Baume & Mercier joined the Richemont team in 1988. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/