Original sentence: Details are lacking on its ammunition used during the First World War, other than it used two different shells, the original HE shell of  at some  per second and a lighter  shell that it shared with its successor, the 42 cm howitzer commonly called Big Bertha.In World War II it used a concrete-piercing shell (42 cm Sprgr Be) weighing , propelled by up to four increments of powder, weighing in total.Like its predecessor it was virtually unique among German World War I-era artillery in using a Welin interrupted-screw breech.The 42 cm Gamma Mörser as it was known in World War II or, originally, the 42 cm kurze Marinekanone L/16 (short Naval gun with 16 caliber barrel) was a German siege howitzer It was one in a series of super-heavy siege guns developed by Krupp before World War I, but doesn't seem to have seen any service in that war.Weapons of the Third Reich: An Encyclopedic Survey of All Small Arms, Artillery and Special Weapons of the German Land Forces 1939-1945
Edited sentence: Details are lacking on its ammunition used during the First World War, other than it used two different shells, the original HE shell of  at some  per second and a lighter  shell that it shared with its successor, the 42 cm howitzer commonly called Big Bertha.In World War II it used a concrete-piercing shell (42 cm Sprgr Be) weighing , propelled by up to four increments of powder, weighing in total.Like its predecessor it was virtually unique among German World War I–era artillery in using a Welin interrupted-screw breech.The 42 cm Gamma Mörser as it was known in World War II or, originally, the 42 cm kurze Marinekanone L/16 (short Naval gun with 16 caliber barrel) was a German siege howitzer It was one in a series of super-heavy siege guns developed by Krupp before World War I, but doesn't seem to have seen any service in that war.Weapons of the Third Reich: An Encyclopedic Survey of All Small Arms, Artillery and Special Weapons of the German Land Forces 1939–1945