The 5 cm KwK 38 L/42 auf Matilda, officially the 5cm KwK 38 L/42 auf infanterie PzKpfw MK II 748(e), and affectionately nicknamed Oswald, was a single British Matilda II tank captured by German forces during the North African Campaign. Oswald was converted into a training tank with a 50mm KwK 38 gun.