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| Start / | Knowledge / | Safety Measures / |
| Accidentals | Designs | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Safety Measures / Press Marks / Accidentals |
Press mark accidental: philatelic term for a press mark deviation caused by accidental |
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Shifted press mark: postage stamp with shifted press mark to another position as intended caused by accidental |
Split press mark: postage stamp with shifted press mark which is extended over multiple sheet positions caused by accidental |
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Missing press mark: postage stamp with shifted press mark which do not reach a sheet position caused by accidental |
Light press mark: postage stamp with clear but too light press mark caused by accidental |
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Strong press mark: postage stamp with clear but too strong press mark caused by accidental |
Press mark plate with accidental: philatelic term for a press mark printed from a damaged printing form caused by accidental |
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