Two howitzers were initially ordered and both 'Barbara' and 'Gudrun', as they were nicknamed, were delivered in time to participate in the South Tyrol offensive of May 1916.

Each load was carried by an eight-wheeled electric-powered trailer with the electricity provided by a Daimler Artillerie-Generatorzugwagen (Artillery Generator truck) M. 16, designed by Ferdinand Porsche.

[1] A 52 cubic meter pit had to be excavated to hold the firing platform which took eight to twenty hours, depending on soil conditions.

A small tilting crane was mounted on the left side of the turntable to move shells from their transport carts to the loading tray.

None were put into service by the Nazis after the Anschluss,[1] possibly because of a lack of ammunition, and it is not certain that Romania actually used their weapon during World War II.