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Knowledge / Gums / Accidentals

Gum Accidental: philatelic term for a gum deviation caused by an accidental

Gum Colour Accidental: philatelic term for a deviation from the intended gum colour caused by accidental

Horizontal Ribbed Gum: postage stamp that was provided with a horizontal instead of vertical ribbed gum caused by accidental

Vertical Ribbed Gum: postage stamp that was provided with a vertical instead of horizontal ribbed gum caused by accidental

Streaked Gum: postage stamp provided with a unevenly gum with stripes, elongated grooves and / or small gum-free areas caused by accidental

Gum With Alien Element: postage stamp in which an alien element was included in the gum caused by accidental

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