Here are some better pictures of some field recovered WWI trench mortars. The large item in the center is a 240mm. As previously discussed, these are not well documented, and I have seen recovered examples identified as UK (9.45"), German and French all laying beside each other, the only way that you could tell the difference was by the fuze installed. This one has been tentatively identified as Italian, but only because of where it was recovered and other items it was associated with (no fuze or adapter present). The only original document that I have on these is for the American variant, also designated 9.45-inch.
For an understanding of its size, it is shown with a 6-inch Newton mortar to the left, a 155mm to the right, and a shipping tube for a 165mm at the far right. It is in front of a shelf of 5-inch naval projectiles. Larger in diameter and length than a US 100lb bomb.

For an understanding of its size, it is shown with a 6-inch Newton mortar to the left, a 155mm to the right, and a shipping tube for a 165mm at the far right. It is in front of a shelf of 5-inch naval projectiles. Larger in diameter and length than a US 100lb bomb.
