Skoda 305 mm Model 1911
>
The Škoda 30.5 cm Mörser M.11 is a siege howitzer produced by Škoda Works and used by the Austro-Hungarian Army during World War I and by Nazi Germany in World War II. Wikipedia
Barrel length: 3.05 m (10 ft) L/10
Caliber: 305 mm (12 in)
Crew: 15–17
Effective firing range: 9,600 m (10,500 yd)
In service: 1911-1945
Place of origin: Austria-Hungary
Produced: 1911–1918?