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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 / Errors |
Press Mark Error: philatelic term for a press mark deviation caused by an error |
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Missing Press Mark: postage stamp with caused by error not printed press mark |
Inverted Press Mark: postage stamp with caused by error inverted instead upright press mark |
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Double Press Mark: postage stamp with caused by error twice instead of once the same press mark |
Press Mark on Front: postage stamp with caused by error press mark on front instead on revers |
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Press Mark Plate With Error: philatelic term for a press mark printed from a caused by error damaged printing form |
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