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Knowledge / Accidentals / Silk Threads

Accidental Silk Thread: philatelic term for an accidental paper with silk thread

Silk Thread Colour Accidental: deviation from the intended silk thread colour caused by an accidental

Shifted Silk Thread: deviation from the intended silk thread position

Missing Silk Thread: shifted silk thread which did not reach a stamp field

Oblique Silk Thread: postage stamp with silk thread shifted out of alignment

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