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"But the problem with reincarnation is that it's hard to imagine what the storage medium for past lives would be. Not to mention the input-output device. I hesitate to rule it out completely, but I'd need pretty definite proof."
- Arthur C. Clarke

Fake-Meter  
  A pocket-sized counterfeit currency detector.  

...the so-called fake-meter. This is a pocket device that, when a counterfeit note is passed through a slot, sounds a warning buzzer. As all small boys know, attempts to disassemble the fake-meter are futile; as soon as the case is damaged it destroys itself.
From The Killing Machine, by Jack Vance.
Published by Fantastic Fiction (?) in 1964
Additional resources -

Philip K. Dick solved this problem in a different way; he thought of an idea for currency that could not be duplicated for genetic reasons; see the entry for truffle skins.

Thanks to R. Probert for contributing this item.

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  More Ideas and Technology from The Killing Machine
  More Ideas and Technology by Jack Vance
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