As an interesting note, I work at a restaurant and found a counterfeit lead quarter in my till... I swapped it out and took it home :) But I don't...
*Captain Jack Sparrow Voice*: Ditto on this one, mate
Acid date them... a little vinegar and some time, and your date will be back. Just don't rub the date after acid treating them.
Beware of counterfeits.... but there is a lot of legitimate stuff, just use common sense....
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