£500 - £700
1912 ½d deep green, Die II Wmk Crown printed double (one albino), a superb UM centre bottom marginal block of four from the 'No Control' printing of Plate 17 recently listed in the Spec. Vol. 2 (14th Edtn) Spec.N4h (unpriced). Photocopy of RPS Cert. 1986 showing a block of 24 - the bottom two rows from where this block was removed.