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| Start / | Knowledge / |
| Accidentals | Changes | Differences | Errors | Fakes | Kinds | Mistakes | Parallel Issues | Printers Waste | Quality |
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Knowledge / Gums / Fakes |
Fake gum: genuine postage stamp with deceitful bogus gum or with faked gum |
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Genuine gum: authentic gum with no additional forgery |
Forgery with gum: deceitful reprint of a postage stamp, all parts are bogus (design print, perforation, gum) |
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Fake gum: genuine postage stamp with deceitful bogus gum |
Fake gum colour: postage stamp with genuine gum with deceitful changed gum colour |
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Fake gum strukture: genuine gum with deceitful changed gum strukture |
Supplemented damaged gum: postage stamp with genuine gum with deceitful supplemented lost parts |
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Supplemented gum with omitted expert´s mark: genuine gum with deceitful supplemented lost parts while leaving out the genuine expert´s mark |
Removed hinge: genuine gum with deceitful removed hinge (rest) to simulate a mint never hinged condition |
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