Founded As Frères Baume in 1830 in Geneva, by brothers Louis-Victor and Célestin Baume, the model later on partnered with Paul Mercier in 1918, becoming the Baume & Mercier We all know these days. In the course of a particularly difficult period of time for that brand, Baume & Mercier https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/