Headtype Ia (Two curved lines in the hair below the Diadem next to the front curl; dark background; flat base of the bust; irregular necklace pearls, front of the bust pointed, the side cross in the diadem is open at the top left).
White or bluish illumination under the UV lamp. 40% longer lighter violet, nearly white afterglow of the phosphor stripe. This type of phosphorus is barely perceptible to the naked eye. Value type: 一 (Thin digit and ST, close side by side (3.70 mm * 3.00 mm))
Basic position of I: 1.85 mm from the left edge; 2.90 mm from the bottom edge. (Michel GB Special: 1217.12.1)
1st Class stamp sold for 19p.
Only issued in booklet SG DX11.
