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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 / Parallel Issues |
Die-cutting parallel issue: the same postage stamps issued at the same time with different die-cuttings |
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Die-cutting shape parallel issue: different postage stamps issued at the same time with different die-cutting shapes |
Die-cutting design parallel issue: the same postage stamps issued at the same time with different die-cutting designs |
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Drop or parchment sheet shaped postage stamp |
Perforation or line die-cutting |
Die-cutting number parallel issue: the same postage stamps issued at the same time with the same die-cutting in different numbers |
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Postage stamp with fine or coarse die-cutting |
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