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| Start / | Knowledge / | Safety Measures / |
| Accidentals | Errors | Fakes | Mistakes | Printers Waste |
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Knowledge / Safety Measures / Chalky Overprints / Accidentals |
Chalky Overprint Accidental: philatelic term for a chalky overprint deviation caused by an accidental |
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Shifted Chalky Overprint: postage stamp with caused by accidental shifted chalky overprint to another position as intended |
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