Monarch Marking 954152 Counterfeit Detection Pens P/k3
"MONARCH MARKING"COUNTERFEIT DETECTION PENSMark on a non-printed area of the bill, if the mark stays amber the bill is valid. If the mark turns dark brown or black, it should be considered suspect of being counterfeit. Effective on US bills printed 1959 and later.Highlights:Effective on US bills printed 1959 and later. Mark on a non-printed area of the bill Carded 3 PACK