Plate number coil

A plate number coil, or PNC is a strip of US coils with plate number.

These have been used on US coil issues since April 1981, with a string of letters and numbers representing the individual color plates for the stamp. "PNC3" is a strip of 3 with the plate number on the center stamp, "PNC5" is a strip of 5 stamps. PNC5 has become the preferred collecting format. Specialists will often collect the limited number of all possible plate numbers for each issue.

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