This is a large stock certificate from the Usines Et Aciéries Sambre et Meuse, dated 1942, cancelled as seen by punch holes. This blue certificate is written in French. 

"Usines Et Aciéries Sambre et Meuse" translates to "Factories and Steelworks of Sambre and Meuse." This was a significant steel manufacturing company that operated in the regions surrounding the Sambre and Meuse rivers, which flow through parts of Belgium and France.

The company was founded in the early 1940s and became known for producing high-quality steel products. They operated until 2009, when they sold part of their operations to a company called Dolex. They primarily produced large steel castings for the railway industry.

Sambre et Meuse manufactured industrial tools such as vises that gained a reputation for exceptional quality. These products were regarded among machinists as the "Rolls" (implying Rolls-Royce quality) of their category - representing a high standard of French industrial production from an era when France had a flourishing manufacturing sector producing high-quality goods.