German/Austria Shell casing 7.5 cm Gebirgskanone M.15 Skoda

The Skoda 7.5 cm Gebirgskanone M. 15 (Bulgarian: 75-мм планинско оръдие “Шкода”) was a mountain gun used by Austria-Hungary in World War I. In German service, it was known as the 7,5cm Skoda Geb. K. M. 15.[4] The Italians designated them as the Obice da 75/13[5] and the Wehrmacht would designate captured guns as 7.5 cm GebK 259(i) after the surrender of Italy in 1943