SG D19c Variety. 1965 (19 July). 1p on 1d Red. POSTAGE DUE. ERROR: 'Surcharge Vertically' and 'Surcharge Omitted, In Pair'. Brilliant Post Office fresh Unmounted horizontal mint strip of four. ERROR: End Pair 'Surcharge Omitted', adjoing stamp 'Surcharge Vertical' and laft stamp Error 'Value Only, Vertical'. The Unique Piece.