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Knowledge / Accidentals / Luminescences

Accidental Luminescence: philatelic term for an accidental luminescence

Shifted Fluorescence Overprint: deviation from the intended fluorescence overprint position

Shifted Phosphorus Overprint: deviation from the intended phosphorus overprint position

Shifted Phosphorus Bar Overprint: deviation from the intended phosphorus bar overprint position

Shifted Phosphorus Bar Overprint: deviation from the intended phosphorus bar overprint position
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