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| Start / | Knowledge / | Safety Measures / |
| Accidentals | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Safety Measures / Stamped Envelope Overprints / Quality |
Stamped envelope overprint quality: subjective assessment of the quality of all properties of a stamped envelope overprint |
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Faultless stamped envelope overprint: stamped envelope overprint without conditional of manufacturing or wrong handling originated quality defect |
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