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| Start / | Knowledge / | Stamps / |
| Accidentals | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Quality |
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Knowledge / Stamps / Meter Stamps / Differences |
Meter stamp difference: common term for two the same meter stamps with no agreement |
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Meter stamp colour difference: common term for two the same meter stamps with no colour agreement |
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Meter stamp arrangement difference: common term for two the same meter stamps with no arrangement agreement |
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