South Africa 1926 4d. grey-blue PROGRESSIVE DIE PROOF in English and printed by Bradbury Wilkinson & Co. The colour is rich and vibrant and the Proof is sunken in woven paper (119mm x 103mm). Initialled and dated in manuscript ‘9/9/25’. THIS IS AN EXQUISITE PROOF WITH MINUTE DETAIL AND IS PROBABLY AN IMPRESSION TAKEN FROM THE MASTER DIE. EXCEPTIONALLY RARE – AN EXHIBITION PIECE OF MAJOR PHILATELIC IMPORTANCE. MAGNIFICENT.