Barometers Realm

David Frédérique Dubois worked in Paris approximately from 1740 to 1790; around 1782 on Rue Saint-Honoré, and since 1783 on Rue du Roule.

In the late 19th century, the French company Guilbert & Cie, based in Paris, specialized in the production of aneroid barometers. Their products were known for their high quality and precision, making them popular among buyers of that era. The company’s distinctive logo featured a leather belt with the initials “G&C” at its center.

Around 1890, the business was acquired by Alfred Casse — better known from the partnership of Dubois & Casse — who continued the production of aneroid barometers under his own name. The last known address of the company was 18–20, Rue de Thorigny in Paris.

In 1902, the Maxant firm acquired Alfred Casse’s business, continuing the tradition of manufacturing high-quality aneroid barometers.

The Maxant logo, featuring an anchor and the initials of its founder, Léon Maxant, is a modified version of the Dubois & Casse emblem, highlighting the continuity between these companies.