User makes a small, quick mark on the surface of currency,Genuine currency will yield a faint, light brown mark,Counterfeit currency will yield a dark brown mark,Recommended particularly for use with all bills equal to or greater than $10 in value
Counterfeit detector pen used for detecting counterfeit bills or currency
User makes a small, quick mark on the surface of currency,Genuine currency will yield a faint, light brown mark,Counterfeit currency will yield a dark brown mark,Recommended particularly for use with all bills equal to or greater than $10 in value
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