203mm/50 Modèle 1924 gun

The 203mm/50 Modèle 1924 naval gun was an artillery system used on the seven Treaty-class cruisers of the French Navy. They were developed after the signing of the Washington Naval Treaty of 1922, when the French Navy found itself with no 203 mm (8-inch) naval gun for mounting on their designated 10,000-ton cruiser. In order to maintain its position as a major naval power, the French Navy decided to develop the Modèle 1924 from scratch. It was also modified for use on the Surcouf, a French submarine built in the 1930s.

The gun entered service on the Duquesne in 1928. It would remain in active service until 1948, when the last cruiser was placed in reserve. The gun was finally removed for inventory when the last treaty cruiser was towed for scrap in 1976.