Swaziland 1962-66 12½c carmine and grey-olive "The Pink Arum", variety WATERMARK INVERTED, lower marginal block of 4 from a left pane with sheet marking proving R4-5/5-6, SG99w.
A fine unmounted mint block with full original gum. The lower pair with faint bend, but still attractive and very scarce.
The Stanley Gibbons catalogue value is £320+.
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