The Mark 1 howitzer was first produced just before the start of World War One in July 1914 and it was rushed into production and reached France in October 1914.
450 of these artillery guns were built between 1914 and 1918
It weighed 15 tons
It fired a 131 kg shell of high explosives
It could fire this weight shell 9,198 meters
took 36 hours to dismantle and three specially built carriages to move it.