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| Start / | Knowledge / | Issue Kinds / |
| Changes | Differences | Parallel Issues |
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Knowledge / Issue Kinds / Other Issue Kinds / Parallel Issues |
Issue Kind Parallel Issue: the same postage stamps issued at the same time in different issue kinds |
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sheet or single manufacturing |
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sheet with image edge or booklet without image edge |
sheet with four-sided perforation or coil with two-sided perforation |
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