Established As Frères Baume in 1830 in Geneva, by brothers Louis-Victor and Célestin Baume, the brand later on partnered with Paul Mercier in 1918, becoming the Baume & Mercier we know today. All through a very complicated period of time to the brand, Baume & Mercier joined the Richemont team https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/