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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 / Accidentals |
Rouletting accidental: philatelic term for a rouletting deviation caused by accidental |
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Missing rouletting hole: roul-etting with a broken punching iron and therefore a hole is missing in the rouletting line caused by accidental |
Rouletting size accidental: philatelic term for a deviation from the intended rouletting size caused by accidental |
Shifted rouletting: postage stamp with shifted rouletting to another position as intended caused by accidental |
Badly centered rouletting: postage stamp with shifted rouletting which is extended over multiple sheet positions caused by accidental |
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Oblique rouletting: postage stamp with out of alignment shifted rouletting lines caused by accidental |
Oblique rouletting: postage stamp with out of alignment shifted rouletting lines caused by accidental |
Rough rouletting: postage stamp with imperfect rouletting with paper residue in the rouletting holes caused by accidental |
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