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| Start / | Knowledge / | Prints / |
| Accidentals | Changes | Designs | Differences | Errors | Fakes | Issue Occasions | Kinds | Mistakes | Parallel Issues | Printers Waste | Safety Measures | Quality |
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Knowledge / Prints / Postage Stamp Reverse Prints / Quality |
Postage Stamp Reverse Print Quality: subjective assessment of the quality of all properties of a postage stamp reverse print |
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Faultless Postage Stamp Reverse Print: postage stamp reverse print without conditi-onal of manufacturing or wrong handling originated quality defect |
Worn Postage Stamp Reverse Print Plate: bad quality postage stamp reverse print from a heavily used worn printing plate |
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