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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 accidental |
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Shifted chalky overprint: postage stamp with shifted chalky overprint to another position as intended caused by accidental |
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