unused Block of Four The phenomenal irregular block of four [1/5/6/9] with watermark inverted and reversed, reformed from its original components, the upper stamp showing maximum sheet margins, usual pre-printing paper fold through [5] and [6], and in exceptional condition. A remarkable showpiece and without doubt one of the most important 4 anna pieces in existence. B.P.A. Certificate No. 38,269 (1992).