Rifled Carriage Light Minenwerfer Mortar
A light carriage minenwerfer class mortar used for direct fire. The barrel and the shifting lever is moved up during loading, while the angle of the mortar is adjusted by the elevating screw in the front.
Encyclopaedia Britannica (12th ed., vol. 32) (New York, NY: The Encyclopaedia Britannica Company, 1922)
Courtesy the private collection of Roy Winkelman