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Perforation Characteristics for Modern U.S. Stamps

Perforation Type Characteristics
11.2 x 11.1 bulls-eye perfs meet perfectly at corners and rows are perfectly aligned
10.8 x 10.9 line perfs meet unevenly at corners
11.2 x 10.5 electric eye perfs meet unevenly at corners
11.2 x 11.1 comb perfs meet nearly perfectly at corners and rows are aligned
11.7 x 11.5 die cut serpentine cut


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