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| Start / | Knowledge / | Postal Shipments / |
| Accidentals | Categories | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Issue Occasions |
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Knowledge / Postal Shipments / Postal Stationeries / Changes |
Postal Stationery Change: the same postal stationeries with a time-shifted change |
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Postal Stationery Colour Change: the same postal stationeries issued chronologic with the same postal stationery print in different colours |
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Edition 1916: light brown print on bluish paper |
Edition 1917: violet print on greyish paper |
Postal Stationery Design Change: the same postal stationeries issued chronologic with different designs |
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Edition 1975: 6 lines on the right side |
Edition 1976: 4 lines on the right side |
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