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| Start / | Knowledge / | Safety Measures / |
| Accidentals | Errors | Fakes | Mistakes | Printers Waste |
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Knowledge / Safety Measures / Chalky Overprints / Fakes |
Fake Chalky Overprint: original postage stamp with deceitful bogus chalky overprint or with faked chalky overprint |
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Genuine Chalky Overprint: authentic chalky overprint with no additional forgery |
Fake Chalky Overprint: original postage stamp with deceitful bogus fake chalky overprint |
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