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| Start / | Knowledge / | Separation Methods / |
| Accidentals | Changes | Designs | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Separation Methods / Die-cuttings / Changes |
Die-cutting Change: the same postage stamps issued chronologic with different die-cuttings |
Die-cutting Number Change: the same postage stamps issued chronologic with the same die-cutting in different numbers |
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Edition 04.1995: coarse die-cutting |
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