Canadian Security Intelligence Service
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Artifacts Collection

Tradecraft Artifacts

Concealment devices

Hollow battery

This item was cleverly crafted to resemble a very common item that would not arouse any undue attention. Its purpose was to contain clandestine messages or microfilm. Its foreign intelligence service designers planned to use it as a dead-letter box or for transporting concealed messages/instructions, etc.

image of Hollow battery
image of disassembled hollow battery

A hollow battery used as a dead-letter box.

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