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| Start / | Knowledge / | Prints / |
| Accidentals | Changes | Errors | Fakes | Kinds | Mistakes | Printers Waste | Quality |
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Knowledge / Prints / Stamped Envelope Overprints / Changes |
Stamped Envelope Overprint Change: the same stamped envelopes issued chronologic with different stamped envelope overprints |
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Stamped Envelope Overprint Colour Change: the same stamped envelopes issued chronologic with the same stamped envelope overprints in different colours |
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Edition 1863: green stamped envelope overprint |
Edition 1874: black stamped envelope overprint |
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