HONG KONG 1981 (MNH) 30C ULTRAMARINE PLATE 3A BLOCK, SPIRAL WATERMARK
30c Queen Elizabeth II plate 3A block x 4, ultramarine, spiral multiple crown and CA upright watermark. Fresh and fine. Mint never hinged. SG315; SC279a; YG248
Note: from July 1980 printing released 12 January 1981 in London
