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21 cm Mörser 10
21 cm Mörser 10 near Victoria Barracks, Melbourne, Australia.
Type Howitzer
Place of origin German Empire
Service history
Used by German Empire
Wars World War I
Production history
Designer Krupp
Weight 15,496 lb (7,029 kg)
Barrel length 2.57 m (8 ft 5 in) L/12

Shell 252 pounds (114 kg)
Caliber 211 mm (8.3 in)
Breech horizontal sliding wedge
Recoil hydro-pneumatic
Carriage box trail
Elevation -6° to +70°
Muzzle velocity 335 m/s (1,101 ft/s)
Maximum range 9,400 m (10,300 yd)

The 21 cm Mörser 10 (21 cm Mrs 10) was a heavy howitzer used by Germany in World War I. It replaced the obsolete 21 cm Mörser 99, which lacked a recoil system. For transport, it broke down into two loads. Some howitzers were fitted with a gun shield during the war. As it was also intended for siege use, a concrete-penetrating shell was also used. Unusually, it had two spades: a folding one halfway down the trail and a fixed one at the end of the trail.

21cm Versuchsmörser 06

Before the 21 cm Mörser 10 was commissioned for mass production, a small test series of 21 cm Versuchsmörser 06 ("test mortar") was given to the German army. Eight pieces equipped two batteries, but their range of only 7 km was found insufficient, so the range was increased for the production version. Serial number 3 of these rare pieces is now exposed at Red Cliffs, Victoria.[1]

21 cm Mörser 10, July 1915

216 were in service at the beginning of the war.[2] It was replaced by the 21 cm Mörser 16, which was also known as the langer 21 cm Mörser since it was merely a lighter 21 cm Mrs 10 with a longer barrel for extra range and other refinements.

The specifications provided for this weapon by difference sources are contradictory and, thus, those given here cannot be regarded as authoritative.

See also


  • Hogg, Ian. Twentieth-Century Artillery. New York: Barnes & Noble Books, 2000 ISBN 0-7607-1994-2
  • Jäger, Herbert. German Artillery of World War One. Ramsbury, Marlborough, Wiltshire: Crowood Press, 2001 ISBN 1-86126-403-8


Further reading

  • (French) Guy François, "Le Mörser de calibre 21 cm", Tank Zone, issue 11/2010, June–July, pp. 46–53, Hachette Histoire et Collections

External links

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