Founded As Frères Baume in 1830 in Geneva, by brothers Louis-Victor and Célestin Baume, the model later partnered with Paul Mercier in 1918, getting the Baume & Mercier we know these days. For the duration of a very complicated interval for your manufacturer, Baume & Mercier joined the Richemont team https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/