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1966 Christmas 3d (phos). ERROR CYLINDER BLOCK WITH HORIZONTAL PHOSPHOR BAND. SG Spec. WP109var

  • Ref: QE0307201
  • Price: £200.00

Fine unmounted mint cylinder block of six with BROAD HORIZONTAL PHOSPHOR BAND across tops of all stamps in upper row.  Footnote in SG Spec. Volume 3 states that this was caused by a phosphor spillage under the doctor blade and affected the top horizontal row of one sheet. This block therefore possibly unique.