Switch No.10 Time Pencil.

Switch No.10, Time Pencil. Widely used by SOE and special forces this delay action fuze was used in conjunction with a detonator or Bickford cord to set off explosives. This example has a yellow safety strip indicating an approx. 12hr delay. The pencil was initiated by crushing the copper tube that shrouds a glass ampuole containing corrosive liquid. In good overall condition.
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Code: 8609