These hollow spy coins from Dereu & Sons have been in use since the Cold War by spies to transport secret messages or suicide poisons. Now you can use them to carry a MicroSD card. Available coins include U.S. nickels (left, $30 each) and half-dollars (a better deal at $25 each), British pounds (right, $33 each), and EU euros ($30 each).
Images: Dereu & Sons Mfg. Co.
Read the full story: "12 Top Spy Gadgets"
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