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| Start / | Knowledge / | Safety Measures / |
| Accidentals | Errors | Fakes | Mistakes | Printers Waste |
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Knowledge / Safety Measures / Chalky Overprints / Mistakes |
Chalky Overprint Mistake: printers term for a deviation caused by chalky overprint mistake |
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Missing Chalky Overprint: postage stamp with caused by mistake not printed chalky overprint |
Shifted Chalky Overprint: postage stamp with caused by mistake shifted chalky overprint to another position as intended |
Double Chalky Overprint: postage stamp with caused by mistake twice instead of once the same chalky overprint |
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Chalky Overprint on Reverse: postage stamp with caused by mistake chalky overprint on reverse instead of front |
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