The No 7 Mk 1 Dingbat mine is a U.K.

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 anti-personnel blast mine

Anti-personnel mine

Anti-personnel mines are a form of land mine designed for use against humans, as opposed to anti-tank mines, which are designed for use against vehicles...

. The mine has a steel body, with a flexible pressure pad on the top surface. Under the pressure pad is a belleville spring with a central striker. The fuse is slid into the side of the mine, a firing pin prevents the fuse being fully inserted until it is removed. The mine was intended to be scattered mechanically, and a number of systems were tested to scatter it. However, none were accepted into service, so the Dingbat mine was hand laid instead. The mine came with a small fabric cover to help hide it.

Note: the United Kingdom has destroyed all its stocks of anti-personnel mines and none are currently held.

Specifications

• Diameter: 57 mm
• Height: 32 mm
• Weight: 113 g
• Explosive content: 56.7 g of Tetryl
  Tetryl
  2,4,6-Trinitrophenylmethylnitramine commonly referred to as tetryl is a sensitive explosive compound used to make detonators and explosive booster charges....
  
  
• Operating pressure: 11 kg to 15 kg