. A unique group" /> Proof DIE PROOFS: Master, ½d., 1d., 2d., 2½d., 5d., 6d., 1/-, 2/6d. and 5/-, all stamp-size in black on glazed card and affixed to two De La Rue day book pieces with dates and details of leads taken, crossed with red ink and dated<I> "10th April 1922"</I>. A unique group | Christie's