Back in the dependable old day of the Cold War , spies did n’t have encrypted cellphones or digital thingamajigs to do their thing , so they did their undercover agent clientele with classic undercover agent stuff like spy camera - pens , spy shoe transmitters , undercover agent Roger Bacon strip , and messages encoded on their spy underpants . Or these Hollow Spy Coins , which were used by the CIA and the KGB to shroud poisonous substance or microfilms . Now you may buy them to stash away whatever is small enough to correspond in them , like discarded nail bite . The coins are still in use by modern undercover agent , however : Last twelvemonth , the US Department of Defense caution its American contractors about hollow Canadian coins containing radio sender . The Canadian coins were found by US defense contractor working on mystical project on three occasions between October 2005 and January 2006 . obviously , these were used to cover movements of citizenry carrying them . agree to the expert , the coin transmitter could have been planted by China , Russia , or even France , not the Canadians , who in reality say they did n’t have a clew these existed . These I are harmless , however , and issue forth in a mixed bag of US and Soviet denominations , and you could even buy a Hollow Steel Spy Bolt and a Dead Drop Spike .
The vacuous Dead Drop Spike was stamped into the ground by one undercover agent , so it could be picked by another later . This one is made from a solid block of aluminum 3/4 inch in diameter .
Full dollar , quarter , nickles , or kopeck , you’re able to buy them from $ 40 to $ 70 . [ Spy CoinsviaUncrate , MSNBC ]

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