1/2d Green, Single Wmk, 1915-1923

Electros 1,2,3,4,5,6 & 7 printed in Green on Single Watermark paper 1915-23

Electros 1,2, & 3 printed by Cooke in 4 printings in 1915, including the separate Single Line perforation printing of Electro 3 in late 1915. Electros 2 ,4 and 5 were printed by Cooke in 1916-17. In 1918-23 Harrison printed Electros 4, 5 ,6 and 7 in Green. Standard texts used to identify the varieties are:

Dix, VW, & Rowntree, AW, 1995, The Australian Commonwealth George V Halfpenny, 3rd Edition, British Society of Australian Philately

Kellow, J (Ed.), 2014, The Australian Commonwealth Speciailists' Catalogue: King George V, Centenary of the King George V Defintives, 1914-2014, Brusden-White