1935 May 1st. Original issue on single watermarked paper.' Ultramarine'.
1935, May 1st, Original issue on single watermarked paper but with different perforations, which was more suited to the vertical mesh of the paper. 'Ultramarine'.
1936 August, Multiple watermark. 'Ultramarine','Pale ultramarine' and Dark ultramarine'
1941 July. Wartime issue, Multiple watermark. Waterlow print and perf.'Pale Ultramarine'
1942 November. Wartime issue. Multiple watermark. De La Rue print and Waterlow perf. 'Ultramarine'
1942 November final issue on Royal Cypher paper, Multiple watermark. 'Ultramarine', 'Deep Ultramarine', 'Pale Ultramarine', 'Dull, dark grey blue', 'Cobalt blue' and 'Bright Ultramarine'.