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Additional Stamp Impressions A T Ms Burelages Cliche Can-
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Stamp Booklets Stamp Impressions Third Overprints Tress Rosettes Watermarks Without Separation Others

Knowledge / Accidentals / Gums

Accidental Gum: philatelic term for an accidental gum

Gum Colour Accidental: deviation from the intended gum colour caused by an accidental

Streak Gum: uneven put on gum with stripes or small gum-free areas

Gum With Alien Element: during the production accidental included alien element

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