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| Start / | Knowledge / | Prints / |
| Accidentals | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Occasions | Parallel Issues | Printers Waste | Quality |
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Knowledge / Prints / Postal Stationery Overprints / Quality |
Postal Stationery Overprint Quality: subjective perception of a postal stationery overprint quality |
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Faultless Postal Stationery Overprint: postal stationery overprint without conditional of manufacturing or wrong handling originated quality defect |
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