120mmFrenchHEShell1916Diagram

Figure 82, page 116 in "High-explosive shell manufacture; a comprehensive treatise on the forging, machining and heat-treatment of high-explosive shells and the manufacture of cartridge cases, primers, and fuses, giving complete directions for tool equipment and methods of setting up machines, together with a review of the making of powders, high explosives, and fulminates" New York, The Industrial Press, 1916.