Started As Frères Baume in 1830 in Geneva, by brothers Louis-Victor and Célestin Baume, the model later partnered with Paul Mercier in 1918, turning into the Baume & Mercier we know now. All through a very hard time period to the model, Baume & Mercier joined the Richemont group in https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/