Founded As Frères Baume in 1830 in Geneva, by brothers Louis-Victor and Célestin Baume, the brand name later partnered with Paul Mercier in 1918, becoming the Baume & Mercier we know right now. During a particularly complicated period with the brand, Baume & Mercier joined the Richemont group in 1988. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/