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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 / Roulettings / Changes |
Rouletting Change: the same postage stamps issued chronologic with different roulettings |
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Rouletting Introduction: the same postage stamps issued chronologic without and than with rouletting |
Rouletting Colour Change: the same postage stamps issued chronologic with the same rouletting in different colours |
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Edition 1862: without separation |
Edition 1865: colourless rouletting |
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