£350 - £400
SG O4a used
OFFICIAL: 1885 ½a blue-green type 2 opt in red and type O2 opt in black, ERROR opt ?SERVICE? DOUBLE, used cancelled by part squared circle for AU 20 90, creases and faintly toned, still not barely affecting otherwise fine appearance. Very rare less than ten examples known, we have recorded SEVEN examples with one in the Royal Collection. SG O4a £900
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