GB 1913 Definitives - King George V - Type Mackennals - August From Stamps of the World Issue Date : Aug 1913 Designed by : Bertram Mackennal Printed by : Print Process : Perforations : 15 x 14 Watermark: Royal Cypher Multiple Bright Green Click for more Details Dull Scarlet Click for more Details Categories: Great Britain1913King George VGB DefinitivesMackennals