During the war new specifications were set up for artillery in the German army. There was a requirement of all round traverse, necessary during the pocket battles were an attack could come from any direction. Also the new guns had to be able to fire at high elevation ranges this because the guns had to be concealed in forests and they had to fire through the trees.
On this page some proposals Krupp made for these new guns.
The masters for these models were made by Hubert Cance
"10,5cm leichte Feldhaubitze.
Both Krupp and Skoda made designs for this gun. This is the Krupp version. It had a three legged carriage, the second design used a copy of the carriage of the 8.8 cm PAK 43 anti tank gun.
15cm schwere Feldhaubitze, model of mock-up.
When a similar requirement was made for a 15cm gun the plans for the 10,5cm leichte Feldhaubitze were scaled up. The result was the 15cm schwere Feldhaubitze. It should have a range of at least 18000 m to outrange the Russian artillery.
Only a mock-up was made and the design was never completed.
12.8cm Kanone 44.
During the war the German army was very impressed by the Russian 12.2 cm guns they captured. There fore the designers were asked if they could develop a similar gun.
A calibre of 12,8 cm was chosen because guns of this size were already manufactured so the machinery to make them was there. Some prototypes were made but no complete guns were delivered, although some gun barrels were fitted on make shift carriages.