FN shell casing 1938 , 47mm anti-tank gun Model 1931

The Royal Cannon Foundry 47mm anti-tank gun Model 1931 (French: Canon anti-char de 47mm Fonderie Royale de Canons Modèle 1931, abbreviated to C.47 F.R.C. Mod.31) was an artillery piece developed in 1931 for the Belgian army which saw widespread service