Accidental Perforation: philatelic term for an accidental perforation |
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Shifted Perforation: deviation from the intended perforation position |
Misperforated Postage Stamp: shifted perforation split on multible postage stamps |
Sheet Turn-Over: paper sheet turned over before perforation |
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Blind Perforation: perforation with not fully punched holes |
Partly Blind Perforation: perforation with not fully punched holes at one or more, but not at all four, sides |
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Missing Perforation Hole: perforation with a missing hole caused by a broken perforation pin |
Oblique Perforation: postage stamp with perforation shifted out of alignment |
Oblique Perforation: postage stamp with perforation shifted out of alignment |
Rough Perforation: imperfect perforation with paper rest in the holes |
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Irregular Perforation: perforation with holes not in a line |
Perforation Size Difference: deviation from the intended size of a perforation |
Level Out Tooth: from the standard deviate tooth to avoid misperforated postage stamps |
Straggering Perforation: perforation with uneven space between the holes |