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| Start / | Knowledge / | Stamps / |
| Categories | Category Changes | Changes | Designs | Differences | Do It Yourself Postage Stamps | Fakes | Issue Occasions |
| Kinds | Parallel Issues | Quality | Shapes | Sizes | Semi-postal Postage Stamps Issue Occasions | ||
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Knowledge / Stamps / Postage Stamps / Parallel Issues |
Postage Stamp Parallel Issue: the same postage stamps issued at the same time |
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Postage Stamp Size Parallel Issue: the same postage stamps issued at the same time in different sizes |
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the same rouletted or perforated postage stamps in different sizes |
the same postage stamps in different sizes |
Postage Stamp Design Parallel Issue: postage stamps issued at the same time with different designs |
Postage Stamp Category Parallel Issue: postage stamps issued at the same time in different categories |
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different commemorative postage stamps issued on 19.06.1984 |
definitive postage stamps and official postage stamps |
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